Commit Graph

376364 Commits

Author SHA1 Message Date
Ben Hutchings 2779db8d37 genirq: Fix can_request_irq() for IRQs without an action
Commit 02725e7471 ('genirq: Use irq_get/put functions'),
inadvertently changed can_request_irq() to return 0 for IRQs that have
no action.  This causes pcibios_lookup_irq() to select only IRQs that
already have an action with IRQF_SHARED set, or to fail if there are
none.  Change can_request_irq() to return 1 for IRQs that have no
action (if the first two conditions are met).

Reported-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
Tested-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is> (against 3.2)
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: 709647@bugs.debian.org
Cc: stable@vger.kernel.org # 2.6.39+
Link: http://bugs.debian.org/709647
Link: http://lkml.kernel.org/r/1372383630.23847.40.camel@deadeye.wl.decadent.org.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-28 12:56:03 +02:00
Sachin Kamat b8394dee78 irqchip: exynos-combiner: Staticize combiner_init
combiner_init() is referenced only in this file. Make it
static.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kgene.kim@samsung.com
Cc: t.figa@samsung.com
Cc: arnd@arndb.de
Cc: patches@linaro.org
Link: http://lkml.kernel.org/r/1372246597-32323-2-git-send-email-sachin.kamat@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-28 12:56:03 +02:00
Uwe Kleine-König 292ec08049 irqchip: Add support for ARMv7-M NVIC
This interrupt controller is integrated in all Cortex-M3 and Cortex-M4
machines.

Support for this controller appeared in Catalin's Cortex tree based on
2.6.33 but was nearly completely rewritten.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Jonathan Austin <jonathan.austin@arm.com>
Cc: kernel@pengutronix.de
Link: http://lkml.kernel.org/r/1372231128-11802-1-git-send-email-u.kleine-koenig@pengutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-26 11:29:38 +02:00
Christian Ruppert b06eb0173e irqchip: Add TB10x interrupt controller driver
The SOC interrupt controller driver for the Abilis Systems TB10x series of
SOCs based on ARC700 CPUs.

Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Pierrick Hascoet <pierrick.hascoet@abilis.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Rob Landley <rob@landley.net>
Cc: devicetree-discuss@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1372177797-9458-1-git-send-email-christian.ruppert@abilis.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 18:54:21 +02:00
Javier Martinez Canillas fbab62c5cd irqdomain: Use irq_get_trigger_type() to get IRQ flags
Use irq_get_trigger_type() to get the IRQ trigger type flags
instead calling irqd_get_trigger_type(irq_desc_get_irq_data(virq))

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-8-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:25 +02:00
Javier Martinez Canillas 5ebf1f29e2 MIPS: octeon: Use irq_get_trigger_type() to get IRQ flags
Use irq_get_trigger_type() to get the IRQ trigger type flags
instead calling irqd_get_trigger_type(irq_desc_get_irq_data(irq))

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-7-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:25 +02:00
Javier Martinez Canillas f88704c95b arm: orion: Use irq_get_trigger_type() to get IRQ flags
Use irq_get_trigger_type() to get the IRQ trigger type flags
instead calling irqd_get_trigger_type(irq_get_irq_data(irq))

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-6-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:25 +02:00
Javier Martinez Canillas 1a5595cb28 mfd: stmpe: use irq_get_trigger_type() to get IRQ flags
Use irq_get_trigger_type() to get the IRQ trigger type flags
instead calling irqd_get_trigger_type(irq_get_irq_data(irq))

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-5-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:25 +02:00
Javier Martinez Canillas 5dbf79d496 mfd: twl4030-irq: Use irq_get_trigger_type() to get IRQ flags
Use irq_get_trigger_type() to get the IRQ trigger type flags
instead calling irqd_get_trigger_type(irq_get_irq_data(irq))

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-4-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:25 +02:00
Javier Martinez Canillas fb90c22ab5 gpio: mvebu: Use irq_get_trigger_type() to get IRQ flags
Use irq_get_trigger_type() to get the IRQ trigger type flags
instead calling irqd_get_trigger_type(irq_get_irq_data(irq))

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-3-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:25 +02:00
Javier Martinez Canillas 1f6236bfd7 genirq: Add irq_get_trigger_type() to get IRQ flags
Drivers that want to get the trigger edge/level type flags for a given
interrupt have to call irq_get_irq_data(irq) to get the struct
irq_data and then irqd_get_trigger_type(irq_data) to obtain the IRQ
flags.

This is not only error prone but also unnecessary exposes the struct
irq_data to callers.

It's better to have an irq_get_trigger_type() function to obtain the
edge/level flags for an IRQ.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-2-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:24 +02:00
James Hogan 6fff831404 genirq: Irqchip: document gcflags arg of irq_alloc_domain_generic_chips
Commit 088f40b7b0 ("genirq: Generic chip:
Add linear irq domain support") missed kerneldoc for the gcflags
argument of irq_alloc_domain_generic_chips(). Add it now.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Link: http://lkml.kernel.org/r/1371564513-4327-1-git-send-email-james.hogan@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-24 15:38:12 +02:00
Ivo Sieben ee23871389 genirq: Set irq thread to RT priority on creation
When a threaded irq handler is installed the irq thread is initially
created on normal scheduling priority. Only after the irq thread is
woken up it sets its priority to RT_FIFO MAX_USER_RT_PRIO/2 itself.

This means that interrupts that occur directly after the irq handler
is installed will be handled on a normal scheduling priority instead
of the realtime priority that one would expect.

Fix this by setting the RT priority on creation of the irq_thread.

Signed-off-by: Ivo Sieben <meltedpianoman@gmail.com>
Cc: Sebastian Andrzej Siewior  <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1370254322-17240-1-git-send-email-meltedpianoman@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-11 16:18:50 +02:00
Sebastian Hesselbarth 9dbd90f17e irqchip: Add support for Marvell Orion SoCs
This patch adds an irqchip driver for the main interrupt controller found
on Marvell Orion SoCs (Kirkwood, Dove, Orion5x, Discovery Innovation).
Corresponding device tree documentation is also added.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Rob Landley <rob@landley.net>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1370536034-23956-2-git-send-email-sebastian.hesselbarth@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-11 16:18:50 +02:00
Andreas Fenkart d671a60558 genirq: Add kerneldoc for irq_disable.
Document the lazy disable functionality. comment based on changelog of
d209a699a0

Signed-off-by: Andreas Fenkart <andreas.fenkart@streamunlimited.com>
Cc: balbi@ti.com
Link: http://lkml.kernel.org/r/1368181290-1583-1-git-send-email-andreas.fenkart@streamunlimited.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 11:09:10 +02:00
Grant Likely e8bd834f73 genirq: irqchip: Add mask to block out invalid irqs
Some controllers have irqs that aren't wired up and must never be used.
For the generic chip attached to an irq_domain this provides a mask that
can be used to block out particular irqs so that they never get mapped.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Link: http://lkml.kernel.org/r/1369793454-19197-2-git-send-email-grant.likely@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:11 +02:00
Thomas Gleixner 088f40b7b0 genirq: Generic chip: Add linear irq domain support
Provide infrastructure for irq chip implementations which work on
linear irq domains.

- Interface to allocate multiple generic chips which are associated to
  the irq domain.

- Interface to get the generic chip pointer for a particular hardware
  interrupt in the domain.

- irq domain mapping function to install the chip for a particular
  interrupt.

Note: This lacks a removal function for now.

[ Sebastian Hesselbarth: Mask cache and pointer math fixups ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Rob Landley <rob@landley.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: http://lkml.kernel.org/r/20130506142539.450634298@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:11 +02:00
Thomas Gleixner 3528d82b68 genirq: Generic chip: Split out code into separate functions
Preparatory patch for linear interrupt domains.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Rob Landley <rob@landley.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: http://lkml.kernel.org/r/20130506142539.377017672@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:11 +02:00
Thomas Gleixner d0051816e6 genirq: irqchip: Add a mask calculation function
Some chips have weird bit mask access patterns instead of the linear
you expect. Allow them to calculate the cached mask themself.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Rob Landley <rob@landley.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: http://lkml.kernel.org/r/20130506142539.302898834@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:10 +02:00
Thomas Gleixner 966dc736b8 genirq: Generic chip: Cache per irq bit mask
Cache the per irq bit mask instead of recalculating it over and over.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Rob Landley <rob@landley.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: http://lkml.kernel.org/r/20130506142539.227119865@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:10 +02:00
Gerlando Falauto af80b0fed6 genirq: Generic chip: Handle separate mask registers
There are cases where all irq_chip_type instances have separate mask
registers, making a shared mask register cache unsuitable for the
purpose.

Introduce a new flag IRQ_GC_MASK_CACHE_PER_TYPE. If set, point the per
chip mask pointer to the per chip private mask cache instead.

[ tglx: Simplified code, renamed flag and massaged changelog ]

Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Joey Oravec <joravec@drewtech.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Holger Brunck <Holger.Brunck@keymile.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Simon Guinot <simon@sequanux.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Rob Landley <rob@landley.net>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: http://lkml.kernel.org/r/20130506142539.152569748@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:10 +02:00
Gerlando Falauto 899f0e66ff genirq: Generic chip: Add support for per chip type mask cache
Today the same interrupt mask cache (stored within struct irq_chip_generic)
is shared between all the irq_chip_type instances. As there are instances
where each irq_chip_type uses a distinct mask register (as it is the case
for Orion SoCs), sharing a single mask cache may be incorrect.
So add a distinct pointer for each irq_chip_type, which for now
points to the original mask register within irq_chip_generic.
So no functional changes here.

[ tglx: Minor cosmetic tweaks ]

Reported-by: Joey Oravec <joravec@drewtech.com>
Signed-off-by: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Holger Brunck <Holger.Brunck@keymile.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Simon Guinot <simon@sequanux.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Rob Landley <rob@landley.net>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: http://lkml.kernel.org/r/20130506142539.082226607@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:10 +02:00
Gerlando Falauto cfeaa93f8a genirq: Generic chip: Remove the local cur_regs() function
Since we already have an irq_data_get_chip_type() function which returns
a pointer to irq_chip_type, use that instead of cur_regs().

Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Joey Oravec <joravec@drewtech.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Holger Brunck <Holger.Brunck@keymile.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Simon Guinot <simon@sequanux.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jean-Francois Moine <moinejf@free.fr>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Rob Landley <rob@landley.net>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: http://lkml.kernel.org/r/20130506142539.010164766@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-05-29 10:57:09 +02:00
Linus Torvalds e4aa937ec7 Linux 3.10-rc3 2013-05-26 16:00:47 -07:00
Manfred Spraul ab465df9dd ipc/sem.c: Fix missing wakeups in do_smart_update_queue()
do_smart_update_queue() is called when an operation (semop,
semctl(SETVAL), semctl(SETALL), ...) modified the array.  It must check
which of the sleeping tasks can proceed.

do_smart_update_queue() missed a few wakeups:
 - if a sleeping complex op was completed, then all per-semaphore queues
   must be scanned - not only those that were modified by *sops
 - if a sleeping simple op proceeded, then the global queue must be
   scanned again

And:
 - the test for "|sops == NULL) before scanning the global queue is not
   required: If the global queue is empty, then it doesn't need to be
   scanned - regardless of the reason for calling do_smart_update_queue()

The patch is not optimized, i.e.  even completing a wait-for-zero
operation causes a rescan.  This is done to keep the patch as simple as
possible.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Acked-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-26 15:14:51 -07:00
Linus Torvalds 89ff77837a NFS client bugfixes for 3.10
- Stable fix to prevent an rpc_task wakeup race
 - Fix a NFSv4.1 session drain deadlock
 - Fix a NFSv4/v4.1 mount regression when not running rpc.gssd
 - Ensure auth_gss pipe detection works in namespaces
 - Fix SETCLIENTID fallback if rpcsec_gss is not available
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Merge tag 'nfs-for-3.10-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:

 - Stable fix to prevent an rpc_task wakeup race
 - Fix a NFSv4.1 session drain deadlock
 - Fix a NFSv4/v4.1 mount regression when not running rpc.gssd
 - Ensure auth_gss pipe detection works in namespaces
 - Fix SETCLIENTID fallback if rpcsec_gss is not available

* tag 'nfs-for-3.10-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: Fix SETCLIENTID fallback if GSS is not available
  SUNRPC: Prevent an rpc_task wakeup race
  NFSv4.1 Fix a pNFS session draining deadlock
  SUNRPC: Convert auth_gss pipe detection to work in namespaces
  SUNRPC: Faster detection if gssd is actually running
  SUNRPC: Fix a bug in gss_create_upcall
2013-05-26 12:33:05 -07:00
Linus Torvalds 932ff06b2a A sysfs file permissions correction.
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Merge tag 'edac_fixes_for_3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull amd64 edac fix from Borislav Petkov:
 "A sysfs file permissions correction"

* tag 'edac_fixes_for_3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  amd64_edac: Fix bogus sysfs file permissions
2013-05-26 09:52:26 -07:00
Linus Torvalds 95f4838e21 Merge branch 'parisc-for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
 "This time we made the kernel- and interruption stack allocation
  reentrant which fixed some strange kernel crashes (specifically
  protection ID traps).

  Furthemore this patchset fixes the interrupt stack in UP and SMP
  configurations by using native locking instructions.  And finally
  usage of floating point calculations on parisc were disabled in the
  MPILIB."

* 'parisc-for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix irq stack on UP and SMP
  parisc/superio: Use module_pci_driver to register driver
  parisc: make interrupt and interruption stack allocation reentrant
  parisc: show number of FPE and unaligned access handler calls in /proc/interrupts
  parisc: add additional parisc git tree to MAINTAINERS file
  parisc: use PAGE_SHIFT instead of hardcoded value 12 in pacache.S
  parisc: add rp5470 entry to machine database
  MPILIB: disable usage of floating point registers on parisc
2013-05-26 09:36:31 -07:00
Linus Torvalds 088d812fe9 xfs: fixes for 3.10-rc3
- Fix for corruption with FSX on 512 byte blocksize filesystems
 - Fix rounding error in xfs_free_file_space
 - Fix use-after-free with extent free intents
 - Add several missing KM_NOFS flags to fix lockdep reports
 - Several fixes for CRC related code
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Merge tag 'for-linus-v3.10-rc3' of git://oss.sgi.com/xfs/xfs

Pull xfs fixes from Ben Myers:
 "Here are fixes for corruption on 512 byte filesystems, a rounding
  error, a use-after-free, some flags to fix lockdep reports, and
  several fixes related to CRCs.  We have a somewhat larger post -rc1
  queue than usual due to fixes related to the CRC feature we merged for
  3.10:

   - Fix for corruption with FSX on 512 byte blocksize filesystems
   - Fix rounding error in xfs_free_file_space
   - Fix use-after-free with extent free intents
   - Add several missing KM_NOFS flags to fix lockdep reports
   - Several fixes for CRC related code"

* tag 'for-linus-v3.10-rc3' of git://oss.sgi.com/xfs/xfs:
  xfs: remote attribute lookups require the value length
  xfs: xfs_attr_shortform_allfit() does not handle attr3 format.
  xfs: xfs_da3_node_read_verify() doesn't handle XFS_ATTR3_LEAF_MAGIC
  xfs: fix missing KM_NOFS tags to keep lockdep happy
  xfs: Don't reference the EFI after it is freed
  xfs: fix rounding in xfs_free_file_space
  xfs: fix sub-page blocksize data integrity writes
2013-05-26 09:35:02 -07:00
Linus Torvalds 72de4c63e5 Last minute one-liners: wrong kfree usage fix, module alias fixup and
kconfig adjustments.
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Merge tag 'for-v3.10-fixes' of git://git.infradead.org/battery-2.6

Pull bettery fixes from Anton Vorontsov:
 "Last minute one-liners: wrong kfree usage fix, module alias fixup and
  kconfig adjustments"

* tag 'for-v3.10-fixes' of git://git.infradead.org/battery-2.6:
  pm2301_charger: Fix module alias prefix
  wm831x_backup: Fix wrong kfree call for devdata->backup.name
  bq27x00: Fix I2C dependency in KConfig
  lp8788-charger: Fix kconfig dependency
2013-05-25 20:32:49 -07:00
Linus Torvalds 1aad08dc57 Power management and ACPI fixes for 3.10-rc3
- Additional CPU ID for the intel_pstate driver from Dirk Brandewie.
 
 - More cpufreq fixes related to ARM big.LITTLE support and locking from
   Viresh Kumar.
 
 - VIA C7 cpufreq build fix from Rafał Bilski.
 
 - ACPI power management fix making it possible to use device power
   states regardless of the CONFIG_PM setting from Rafael J. Wysocki.
 
 - New ACPI video blacklist item from Bastian Triller.
 
 /
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Merge tag 'pm+acpi-3.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:

 - Additional CPU ID for the intel_pstate driver from Dirk Brandewie.

 - More cpufreq fixes related to ARM big.LITTLE support and locking from
   Viresh Kumar.

 - VIA C7 cpufreq build fix from Rafał Bilski.

 - ACPI power management fix making it possible to use device power
   states regardless of the CONFIG_PM setting from Rafael J Wysocki.

 - New ACPI video blacklist item from Bastian Triller.

* tag 'pm+acpi-3.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / video: Add "Asus UL30A" to ACPI video detect blacklist
  cpufreq: arm_big_little_dt: Instantiate as platform_driver
  cpufreq: arm_big_little_dt: Register driver only if DT has valid data
  cpufreq / e_powersaver: Fix linker error when ACPI processor is a module
  cpufreq / intel_pstate: Add additional supported CPU ID
  cpufreq: Drop rwsem lock around CPUFREQ_GOV_POLICY_EXIT
  ACPI / PM: Allow device power states to be used for CONFIG_PM unset
2013-05-25 20:32:00 -07:00
Linus Torvalds 27a24cfa04 Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dma fixes from Vinod Koul:
 "We have two patches from Andy & Rafael fixing the Lynxpoint dma"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  ACPI / LPSS: register clock device for Lynxpoint DMA properly
  dma: acpi-dma: parse CSRT to extract additional resources
2013-05-25 20:30:31 -07:00
Kyle McMartin 6b3f7b5c22 score: remove redundant kcore_list entries
kcore_vmalloc is in fs/proc/kcore.c and kcore_mem is unused across
the tree. Noticed while grepping the tree for some other kcore stuff.

(score looks pretty unmaintained to me.)

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-25 10:27:27 -07:00
Linus Torvalds 462a2b58b9 Fixes for 3.10
* Fallouts/wreckage of Cache Flush optimizations / aliasing dcache support
 
 * Fix for an interesting bug where piped input to grep was getting
   mysteriously clobbered
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Merge tag 'arc-v3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

 - Fallouts/wreckage of Cache Flush optimizations / aliasing dcache
   support

 - Fix for an interesting bug where piped input to grep was getting
   mysteriously clobbered

* tag 'arc-v3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: lazy dcache flush broke gdb in non-aliasing configs
  ARC: Use enough bits for determining page's cache color
  ARC: Brown paper bag bug in macro for checking cache color
  ARC: copy_(to|from)_user() to honor usermode-access permissions
  ARC: [mm] Prevent stray dcache lines after__sync_icache_dcach()
  ARC: [TB10x] Remove redundant abilis,simple-pinctrl mechanism
2013-05-25 10:06:20 -07:00
Linus Torvalds 4dd9aa8948 Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King:
 "Just three this time, all really quite small"

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7729/1: vfp: ensure VFP_arch is non-zero when VFP is not supported
  ARM: 7727/1: remove the .vm_mm value from gate_vma
  ARM: 7723/1: crypto: sha1-armv4-large.S: fix SP handling
2013-05-25 10:05:24 -07:00
Vineet Gupta 7bb66f6e6e ARC: lazy dcache flush broke gdb in non-aliasing configs
gdbserver inserting a breakpoint ends up calling copy_user_page() for a
code page. The generic version of which (non-aliasing config) didn't set
the PG_arch_1 bit hence update_mmu_cache() didn't sync dcache/icache for
corresponding dynamic loader code page - causing garbade to be executed.

So now aliasing versions of copy_user_highpage()/clear_page() are made
default. There is no significant overhead since all of special alias
handling code is compiled out for non-aliasing build

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-25 14:15:55 +05:30
Linus Torvalds 9cf1848278 Merge branch 'akpm' (incoming from Andrew Morton)
Merge fixes from Andrew Morton:
 "A bunch of fixes and one simple fbdev driver which missed the merge
  window because people will still talking about it (to no great
  effect)."

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (30 commits)
  aio: fix kioctx not being freed after cancellation at exit time
  mm/pagewalk.c: walk_page_range should avoid VM_PFNMAP areas
  drivers/rtc/rtc-max8998.c: check for pdata presence before dereferencing
  ocfs2: goto out_unlock if ocfs2_get_clusters_nocache() failed in ocfs2_fiemap()
  random: fix accounting race condition with lockless irq entropy_count update
  drivers/char/random.c: fix priming of last_data
  mm/memory_hotplug.c: fix printk format warnings
  nilfs2: fix issue of nilfs_set_page_dirty() for page at EOF boundary
  drivers/block/brd.c: fix brd_lookup_page() race
  fbdev: FB_GOLDFISH should depend on HAS_DMA
  drivers/rtc/rtc-pl031.c: pass correct pointer to free_irq()
  auditfilter.c: fix kernel-doc warnings
  aio: fix io_getevents documentation
  revert "selftest: add simple test for soft-dirty bit"
  drivers/leds/leds-ot200.c: fix error caused by shifted mask
  mm/THP: use pmd_populate() to update the pmd with pgtable_t pointer
  linux/kernel.h: fix kernel-doc warning
  mm compaction: fix of improper cache flush in migration code
  rapidio/tsi721: fix bug in MSI interrupt handling
  hfs: avoid crash in hfs_bnode_create
  ...
2013-05-24 18:12:15 -07:00
Linus Torvalds 00cec111ac ARM: SoC fixes for 3.10-rc
We didn't have any fixes sent up for -rc2, so this is a slightly larger
 batch. A bit all over the place platform-wise; OMAP, at91, marvell,
 renesas, sunxi, ux500, etc.
 
 I tried to summarize highlights but there isn't a whole lot to point
 out. Lots of little things fixed all over. A couple of defconfig updates
 due to new/changing options.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "We didn't have any fixes sent up for -rc2, so this is a slightly
  larger batch.  A bit all over the place platform-wise; OMAP, at91,
  marvell, renesas, sunxi, ux500, etc.

  I tried to summarize highlights but there isn't a whole lot to point
  out.  Lots of little things fixed all over.  A couple of defconfig
  updates due to new/changing options."

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (44 commits)
  ARM: at91/sama5: fix incorrect PMC pcr div definition
  ARM: at91/dt: fix macb pinctrl_macb_rmii_mii_alt definition
  ARM: at91: at91sam9n12: move external irq declatation to DT
  ARM: shmobile: marzen: Use error values in usb_power_*
  ARM: tegra: defconfig fixes
  ARM: nomadik: fix IRQ assignment for SMC ethernet
  ARM: vt8500: Add missing NULL terminator in dt_compat
  clk: tegra: add ac97 controller clock
  clk: tegra: remove USB from clk init table
  ARM: dts: mvebu: Fix wrong the address reg value for the L2-cache node
  ARM: plat-orion: Fix num_resources and id for ge10 and ge11
  ARM: OMAP2+: hwmod: Remove sysc slave idle and auto idle apis
  SERIAL: OMAP: Remove the slave idle handling from the driver
  ARM: OMAP2+: serial: Remove the un-used slave idle hooks
  ARM: OMAP2+: hwmod-data: UART IP needs software control to manage sidle modes
  ARM: OMAP2+: hwmod: Add a new flag to handle SIDLE in SWSUP only in active
  ARM: OMAP2+: hwmod: Fix sidle programming in _enable_sysc()/_idle_sysc()
  arm: mvebu: fix the 'ranges' property to handle PCIe
  ARM: mvebu: select ARCH_REQUIRE_GPIOLIB for mvebu platform
  ARM: AM33XX: Add missing .clkdm_name to clkdiv32k_ick clock
  ...
2013-05-24 16:27:37 -07:00
Benjamin LaHaise 03e04f048d aio: fix kioctx not being freed after cancellation at exit time
The recent changes overhauling fs/aio.c introduced a bug that results in
the kioctx not being freed when outstanding kiocbs are cancelled at
exit_aio() time.  Specifically, a kiocb that is cancelled has its
completion events discarded by batch_complete_aio(), which then fails to
wake up the process stuck in free_ioctx().  Fix this by modifying the
wait_event() condition in free_ioctx() appropriately.

This patch was tested with the cancel operation in the thread based code
posted yesterday.

[akpm@linux-foundation.org: fix build]
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Josh Boyer <jwboyer@redhat.com>
Cc: Zach Brown <zab@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:53 -07:00
Cliff Wickman a9ff785e44 mm/pagewalk.c: walk_page_range should avoid VM_PFNMAP areas
A panic can be caused by simply cat'ing /proc/<pid>/smaps while an
application has a VM_PFNMAP range.  It happened in-house when a
benchmarker was trying to decipher the memory layout of his program.

/proc/<pid>/smaps and similar walks through a user page table should not
be looking at VM_PFNMAP areas.

Certain tests in walk_page_range() (specifically split_huge_page_pmd())
assume that all the mapped PFN's are backed with page structures.  And
this is not usually true for VM_PFNMAP areas.  This can result in panics
on kernel page faults when attempting to address those page structures.

There are a half dozen callers of walk_page_range() that walk through a
task's entire page table (as N.  Horiguchi pointed out).  So rather than
change all of them, this patch changes just walk_page_range() to ignore
VM_PFNMAP areas.

The logic of hugetlb_vma() is moved back into walk_page_range(), as we
want to test any vma in the range.

VM_PFNMAP areas are used by:
- graphics memory manager   gpu/drm/drm_gem.c
- global reference unit     sgi-gru/grufile.c
- sgi special memory        char/mspec.c
- and probably several out-of-tree modules

[akpm@linux-foundation.org: remove now-unused hugetlb_vma() stub]
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Sterba <dsterba@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:53 -07:00
Tomasz Figa 43c523bff7 drivers/rtc/rtc-max8998.c: check for pdata presence before dereferencing
Currently the driver can crash with a NULL pointer dereference if no
pdata is provided, despite of successful registration of the MFD part.
This patch fixes the problem by adding a NULL check before dereferencing
the pdata pointer.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Sachin Kamat <sachin.kamat@linaro.org>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:53 -07:00
Joseph Qi b4ca2b4b57 ocfs2: goto out_unlock if ocfs2_get_clusters_nocache() failed in ocfs2_fiemap()
Last time we found there is lock/unlock bug in ocfs2_file_aio_write, and
then we did a thorough search for all lock resources in
ocfs2_inode_info, including rw, inode and open lockres and found this
bug.  My kernel version is 3.0.13, and it is also in the lastest version
3.9.  In ocfs2_fiemap, once ocfs2_get_clusters_nocache failed, it should
goto out_unlock instead of out, because we need release buffer head, up
read alloc sem and unlock inode.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Acked-by: Sunil Mushran <sunil.mushran@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Jiri Kosina 10b3a32d29 random: fix accounting race condition with lockless irq entropy_count update
Commit 902c098a36 ("random: use lockless techniques in the interrupt
path") turned IRQ path from being spinlock protected into lockless
cmpxchg-retry update.

That commit removed r->lock serialization between crediting entropy bits
from IRQ context and accounting when extracting entropy on userspace
read path, but didn't turn the r->entropy_count reads/updates in
account() to use cmpxchg as well.

It has been observed, that under certain circumstances this leads to
read() on /dev/urandom to return 0 (EOF), as r->entropy_count gets
corrupted and becomes negative, which in turn results in propagating 0
all the way from account() to the actual read() call.

Convert the accounting code to be the proper lockless counterpart of
what has been partially done by 902c098a36.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Greg KH <greg@kroah.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Jarod Wilson 1e7e2e05c1 drivers/char/random.c: fix priming of last_data
Commit ec8f02da9e ("random: prime last_data value per fips
requirements") added priming of last_data per fips requirements.

Unfortuantely, it did so in a way that can lead to multiple threads all
incrementing nbytes, but only one actually doing anything with the extra
data, which leads to some fun random corruption and panics.

The fix is to simply do everything needed to prime last_data in a single
shot, so there's no window for multiple cpus to increment nbytes -- in
fact, we won't even increment or decrement nbytes anymore, we'll just
extract the needed EXTRACT_SIZE one time per pool and then carry on with
the normal routine.

All these changes have been tested across multiple hosts and
architectures where panics were previously encoutered.  The code changes
are are strictly limited to areas only touched when when booted in fips
mode.

This change should also go into 3.8-stable, to make the myriads of fips
users on 3.8.x happy.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Tested-by: Jan Stodola <jstodola@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Matt Mackall <mpm@selenic.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Randy Dunlap 348f9f05e0 mm/memory_hotplug.c: fix printk format warnings
Fix printk format warnings in mm/memory_hotplug.c by using "%pa":

  mm/memory_hotplug.c: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 2 has type 'resource_size_t' [-Wformat]
  mm/memory_hotplug.c: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'resource_size_t' [-Wformat]

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Ryusuke Konishi 136e8770cd nilfs2: fix issue of nilfs_set_page_dirty() for page at EOF boundary
nilfs2: fix issue of nilfs_set_page_dirty for page at EOF boundary

DESCRIPTION:
 There are use-cases when NILFS2 file system (formatted with block size
lesser than 4 KB) can be remounted in RO mode because of encountering of
"broken bmap" issue.

The issue was reported by Anthony Doggett <Anthony2486@interfaces.org.uk>:
 "The machine I've been trialling nilfs on is running Debian Testing,
  Linux version 3.2.0-4-686-pae (debian-kernel@lists.debian.org) (gcc
  version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.35-2), but I've
  also reproduced it (identically) with Debian Unstable amd64 and Debian
  Experimental (using the 3.8-trunk kernel).  The problematic partitions
  were formatted with "mkfs.nilfs2 -b 1024 -B 8192"."

SYMPTOMS:
(1) System log contains error messages likewise:

    [63102.496756] nilfs_direct_assign: invalid pointer: 0
    [63102.496786] NILFS error (device dm-17): nilfs_bmap_assign: broken bmap (inode number=28)
    [63102.496798]
    [63102.524403] Remounting filesystem read-only

(2) The NILFS2 file system is remounted in RO mode.

REPRODUSING PATH:
(1) Create volume group with name "unencrypted" by means of vgcreate utility.
(2) Run script (prepared by Anthony Doggett <Anthony2486@interfaces.org.uk>):

----------------[BEGIN SCRIPT]--------------------

VG=unencrypted
lvcreate --size 2G --name ntest $VG
mkfs.nilfs2 -b 1024 -B 8192 /dev/mapper/$VG-ntest
mkdir /var/tmp/n
mkdir /var/tmp/n/ntest
mount /dev/mapper/$VG-ntest /var/tmp/n/ntest
mkdir /var/tmp/n/ntest/thedir
cd /var/tmp/n/ntest/thedir
sleep 2
date
darcs init
sleep 2
dmesg|tail -n 5
date
darcs whatsnew || true
date
sleep 2
dmesg|tail -n 5
----------------[END SCRIPT]--------------------

REPRODUCIBILITY: 100%

INVESTIGATION:
As it was discovered, the issue takes place during segment
construction after executing such sequence of user-space operations:

  open("_darcs/index", O_RDWR|O_CREAT|O_NOCTTY, 0666) = 7
  fstat(7, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
  ftruncate(7, 60)

The error message "NILFS error (device dm-17): nilfs_bmap_assign: broken
bmap (inode number=28)" takes place because of trying to get block
number for third block of the file with logical offset #3072 bytes.  As
it is possible to see from above output, the file has 60 bytes of the
whole size.  So, it is enough one block (1 KB in size) allocation for
the whole file.  Trying to operate with several blocks instead of one
takes place because of discovering several dirty buffers for this file
in nilfs_segctor_scan_file() method.

The root cause of this issue is in nilfs_set_page_dirty function which
is called just before writing to an mmapped page.

When nilfs_page_mkwrite function handles a page at EOF boundary, it
fills hole blocks only inside EOF through __block_page_mkwrite().

The __block_page_mkwrite() function calls set_page_dirty() after filling
hole blocks, thus nilfs_set_page_dirty function (=
a_ops->set_page_dirty) is called.  However, the current implementation
of nilfs_set_page_dirty() wrongly marks all buffers dirty even for page
at EOF boundary.

As a result, buffers outside EOF are inconsistently marked dirty and
queued for write even though they are not mapped with nilfs_get_block
function.

FIX:
This modifies nilfs_set_page_dirty() not to mark hole blocks dirty.

Thanks to Vyacheslav Dubeyko for his effort on analysis and proposals
for this issue.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Reported-by: Anthony Doggett <Anthony2486@interfaces.org.uk>
Reported-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Cc: Vyacheslav Dubeyko <slava@dubeyko.com>
Tested-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Brian Behlendorf dfd20b2b17 drivers/block/brd.c: fix brd_lookup_page() race
The index on the page must be set before it is inserted in the radix
tree.  Otherwise there is a small race which can occur during lookup
where the page can be found with the incorrect index.  This will trigger
the BUG_ON() in brd_lookup_page().

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reported-by: Chris Wedgwood <cw@f00f.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Geert Uytterhoeven e5ee7305ae fbdev: FB_GOLDFISH should depend on HAS_DMA
If NO_DMA=y:

  drivers/built-in.o: In function `goldfish_fb_remove':
  drivers/video/goldfishfb.c:301: undefined reference to `dma_free_coherent'
  drivers/built-in.o: In function `goldfish_fb_probe':
  drivers/video/goldfishfb.c:247: undefined reference to `dma_alloc_coherent'
  drivers/video/goldfishfb.c:280: undefined reference to `dma_free_coherent'

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Lars-Peter Clausen cac29af6bd drivers/rtc/rtc-pl031.c: pass correct pointer to free_irq()
free_irq() expects the same pointer that was passed to request_irq(),
otherwise the IRQ is not freed.

The issue was found using the following coccinelle script:

  <smpl>
  @r1@
  type T;
  T devid;
  @@
  request_irq(..., devid)

  @r2@
  type r1.T;
  T devid;
  position p;
  @@
  free_irq@p(..., devid)

  @@
  position p != r2.p;
  @@
  *free_irq@p(...)
  </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
Randy Dunlap 387b8b3e37 auditfilter.c: fix kernel-doc warnings
Fix kernel-doc warnings in kernel/auditfilter.c:

  Warning(kernel/auditfilter.c:1029): Excess function parameter 'loginuid' description in 'audit_receive_filter'
  Warning(kernel/auditfilter.c:1029): Excess function parameter 'sessionid' description in 'audit_receive_filter'
  Warning(kernel/auditfilter.c:1029): Excess function parameter 'sid' description in 'audit_receive_filter'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00