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Maciej W. Rozycki 5359b938c0 MIPS: DECstation I/O ASIC DMA interrupt handling fix 
This change complements commit d0da7c002f7b2a93582187a9e3f73891a01d8ee4
and brings clear_ioasic_irq back, renaming it to clear_ioasic_dma_irq at
the same time, to make I/O ASIC DMA interrupts functional.

Unlike ordinary I/O ASIC interrupts DMA interrupts need to be deasserted
by software by writing 0 to the respective bit in I/O ASIC's System
Interrupt Register (SIR), similarly to how CP0.Cause.IP0 and CP0.Cause.IP1
bits are handled in the CPU (the difference is SIR DMA interrupt bits are
R/W0C so there's no need for an RMW cycle).  Otherwise the handler is
reentered over and over again.

The only current user is the DEC LANCE Ethernet driver and its extremely
uncommon DMA memory error handler that does not care when exactly the
interrupt is cleared.  Anticipating the use of DMA interrupts by the Zilog
SCC driver this change however exports clear_ioasic_dma_irq for device
drivers to choose the right application-specific sequence to clear the
request explicitly rather than calling it implicitly in the .irq_eoi
handler of `struct irq_chip'.  Previously these interrupts were cleared in
the .end handler of the said structure, before it was removed.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5826/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 		2013-09-13 11:57:40 +02:00
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accessibility
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acpi ACPI and power management fixes for 3.12-rc1 2013-09-12 11:22:45 -07:00
amba
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ata Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2013-09-03 18:19:53 -07:00
atm atm: he: print MAC via %pM 2013-09-04 14:41:55 -04:00
auxdisplay
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base thp: account anon transparent huge pages into NR_ANON_PAGES 2013-09-12 15:38:03 -07:00
bcma
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block pktcdvd: fix defective misuses of pkt_<level> 2013-09-11 15:59:34 -07:00
bluetooth
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bus ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
cdrom
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char tpm: convert tpm_tis driver to use dev_pm_ops from legacy pm_ops 2013-09-11 15:58:16 -07:00
clk The common clk framework changes for 3.12 are dominated by clock driver 2013-09-09 15:49:04 -07:00
clocksource The common clk framework changes for 3.12 are dominated by clock driver 2013-09-09 15:49:04 -07:00
connector
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cpufreq Merge branch 'pm-cpufreq' 2013-09-12 13:04:11 +02:00
cpuidle ACPI and power management fixes for 3.12-rc1 2013-09-12 11:22:45 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux 2013-09-07 12:53:35 +10:00
dca
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devfreq
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dio
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dma Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2013-09-10 13:37:36 -07:00
edac Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2013-09-06 11:14:33 -07:00
eisa
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extcon Driver core patches for 3.12-rc1 2013-09-03 11:37:15 -07:00
firewire
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firmware firmware/dmi_scan: drop OOM messages 2013-09-11 15:58:51 -07:00
fmc
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gpio Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-09-12 16:14:49 -07:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-09-12 15:01:38 -07:00
hid Revert "Input: introduce BTN/ABS bits for drums and guitars" 2013-09-07 09:48:41 -07:00
hsi
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hv
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hwmon hwmon: (ina2xx) Remove casting the return value which is a void pointer 2013-09-10 06:28:31 -07:00
hwspinlock
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i2c i2c: davinci: Fix bad dev_get_platdata() conversion 2013-09-10 14:23:20 -07:00
ide ide: sgiioc4: Staticize ioc4_ide_attach_one() 2013-09-05 15:21:30 -04:00
idle
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iio staging tree merge for 3.12-rc1 2013-09-03 11:37:57 -07:00
infiniband Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-09-12 16:11:45 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-09-07 10:38:46 -07:00
iommu IOMMU Updates for Linux v3.12 2013-09-12 11:29:26 -07:00
ipack
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irqchip ARM: SoC late changes for v3.12 2013-09-09 16:35:29 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-09-05 14:54:29 -07:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2013-09-12 11:35:33 -07:00
lguest lguest: fix guest kernel stack overflow when TF bit set. 2013-09-06 08:09:27 +09:30
macintosh
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mailbox
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md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-09-12 15:01:38 -07:00
media Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-09-06 10:49:42 -07:00
memory ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
memstick memstick: add support for legacy memorysticks 2013-09-11 15:59:35 -07:00
message
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mfd For the 3.12 merge window we have one new driver for the DA9063 PMIC 2013-09-07 20:14:19 -07:00
misc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-09-05 08:50:26 -07:00
mmc MMC highlights for 3.12: 2013-09-10 13:33:09 -07:00
mtd - factor out common code from MTD tests 2013-09-09 10:33:19 -07:00
net MIPS: DECstation I/O ASIC DMA interrupt handling fix 2013-09-13 11:57:40 +02:00
nfc
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ntb ntb: clean up unnecessary MSI/MSI-X capability find 2013-09-05 11:08:01 -07:00
nubus
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of Merge branch 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2013-09-11 19:11:59 -07:00
oprofile oprofile: get rid of pointless forward declarations of struct super_block 2013-09-03 22:52:48 -04:00
parisc PCI changes for the v3.12 merge window: 2013-09-03 16:24:35 -07:00
parport
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pci ACPI and power management fixes for 3.12-rc1 2013-09-12 11:22:45 -07:00
pcmcia
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pinctrl PTR_RET() is a weird name, and led to some confusing usage. We ended 2013-09-04 17:31:11 -07:00
platform platform: convert apple-gmux driver to dev_pm_ops from legacy pm_ops 2013-09-11 15:58:16 -07:00
pnp pnp: change pnp bus pm_ops to invoke pnp driver dev_pm_ops if specified 2013-09-11 15:58:15 -07:00
power New drivers: 2013-09-10 22:58:14 -07:00
pps drivers/pps/clients/pps-gpio.c: remove unnecessary platform_set_drvdata() 2013-09-11 15:59:34 -07:00
ps3
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ptp
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pwm ARM: SoC cleanups for 3.12 2013-09-06 13:21:16 -07:00
rapidio
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regulator PTR_RET() is a weird name, and led to some confusing usage. We ended 2013-09-04 17:31:11 -07:00
remoteproc
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reset
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rpmsg
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rtc rtc: simplify devm_request_mem_region/devm_ioremap 2013-09-11 15:58:59 -07:00
s390 s390/vmcore: use vmcore for zfcpdump 2013-09-11 15:59:15 -07:00
sbus
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scsi Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-09-12 16:11:45 -07:00
sfi
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sh
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sn
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spi ARM: SoC DT updates for 3.12 2013-09-06 13:26:27 -07:00
ssb
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staging staging/lustre/libcfs: cleanup linux-mem.h 2013-09-10 18:56:32 -04:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-09-12 16:11:45 -07:00
tc
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thermal drivers: thermal: add check when unregistering cpu cooling 2013-09-03 09:10:34 -04:00
tty Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-09-07 10:38:46 -07:00
uio Driver core patches for 3.12-rc1 2013-09-03 11:37:15 -07:00
usb Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-09-06 10:49:42 -07:00
uwb
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vfio vfio-pci: PCI hot reset interface 2013-09-04 11:28:04 -06:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-09-12 16:11:45 -07:00
video Bye, bye, WfW flag 2013-09-11 19:55:12 -07:00
virt
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virtio virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM 2013-09-09 10:02:53 +09:30
vlynq
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vme
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w1 drivers/w1/masters/mxc_w1.c: remove unnecessary platform_set_drvdata() 2013-09-11 15:59:36 -07:00
watchdog Merge git://www.linux-watchdog.org/linux-watchdog 2013-09-12 08:45:53 -07:00
xen Bug-fixes: 2013-09-12 11:28:24 -07:00
zorro
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Kconfig
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Makefile
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