linux/arch/unicore32
Lorenzo Pieralisi 0d368cb06e unicore32/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks
The pci_fixup_irqs() function allocates IRQs for all PCI devices present in
a system; those PCI devices possibly belong to different PCI bus trees (and
possibly rooted at different host bridges) and may well be enabled (ie
probed and bound to a driver) by the time pci_fixup_irqs() is called when
probing a given host bridge driver.

Furthermore, current kernel code relying on pci_fixup_irqs() to assign
legacy PCI IRQs to devices does not work at all for hotplugged devices in
that the code carrying out the IRQ fixup is called at host bridge driver
probe time, which just cannot take into account devices hotplugged after
the system has booted.

The introduction of map/swizzle function hooks in struct pci_host_bridge
allows us to define per-bridge map/swizzle functions that can be used at
device probe time in PCI core code to allocate IRQs for a given device
(through pci_assign_irq()).

Convert PCI host bridge initialization code to the
pci_scan_root_bus_bridge() API (that allows to pass a struct
pci_host_bridge with initialized map/swizzle pointers) and remove the
pci_fixup_irqs() call from arch code.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
2017-08-03 16:29:34 -05:00
..
boot kbuild: drop redundant "PHONY += FORCE" 2016-04-20 10:38:40 +02:00
configs unicore32: use the new LED disk activity trigger 2016-06-27 08:58:42 +02:00
include unicore32: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-11 21:33:52 +09:00
kernel unicore32/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks 2017-08-03 16:29:34 -05:00
lib unicore32: get rid of zeroing and switch to RAW_COPY_USER 2017-03-28 18:24:04 -04:00
mm sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
.gitignore
Kconfig CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now 2017-04-26 12:11:01 -04:00
Kconfig.debug
Makefile unicore32: Use full path in KBUILD_IMAGE definition 2017-03-20 22:42:21 +09:00