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Yinghai Lu 8e149e09f9 pci/irq: restore mask_bits in msi shutdown -v3 
[PATCH 1/2] pci/irq: restore mask_bits in msi shutdown -v3

Yinghai found that kexec'ing a RHEL 5.1 kernel with 2.6.25-rc3+ kernels
prevents his NIC from working.  He bisected to

| commit 89d694b9db
| Author: Thomas Gleixner <tglx@linutronix.de>
| Date:   Mon Feb 18 18:25:17 2008 +0100
|
|   genirq: do not leave interupts enabled on free_irq
|
|   The default_disable() function was changed in commit:
|
|    76d2160147
|    genirq: do not mask interrupts by default
|

For MSI, default_shutdown will call mask_bit for msi device.  All mask bits
will left disabled after free_irq.  Then in the kexec case, the next kernel
can only use msi_enable bit, so all device's MSI can not be used.

So lets to restore the mask bit to its pci reset defined value (enabled) when
we disable the kernels use of msi to be a little friendlier to kexec'd kernels.

Extend msi_set_mask_bit to msi_set_mask_bits to take mask, so we can fully
restore that to 0x00 instead of 0xfe.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
2008-04-29 09:11:12 -07:00
..
acorn/char
acpi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial 2008-04-21 16:36:46 -07:00
amba
ata Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6 2008-04-21 15:49:58 -07:00
atm drivers/atm: use time_before, time_before_eq, etc 2008-04-19 18:14:50 -07:00
auxdisplay
base bus_remove_device: be more careful about incomplete initialization 2008-04-22 17:40:36 -07:00
block fix brd allocation flags 2008-04-22 13:38:03 -07:00
bluetooth hci_usb: remove code obfuscation 2008-04-19 18:17:26 -07:00
cdrom cdrom: use kmalloced buffers instead of buffers on stack 2008-04-21 09:50:08 +02:00
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial 2008-04-21 16:36:46 -07:00
clocksource
connector
cpufreq
cpuidle
crypto [CRYPTO] padlock-aes: Use generic setkey function 2008-04-21 10:19:34 +08:00
dca
dio
dma DMA engine: typo fixes 2008-04-21 22:38:45 +00:00
edac
eisa
firewire Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
firmware Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6 2008-04-21 15:49:58 -07:00
gpio
hid HID: Suppress hidinput for Samsung IR control 2008-04-22 11:34:59 +02:00
hwmon
i2c i2c: Fix platform driver hotplug/coldplug 2008-04-22 22:16:49 +02:00
ide cdrom: make unregister_cdrom() return void 2008-04-21 09:50:08 +02:00
ieee1394 Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
infiniband IB/ipath: Correct capitalization "IntX" -> "INTx" 2008-04-21 18:19:15 -07:00
input Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc 2008-04-21 15:41:27 -07:00
isdn Merge branch 'irq-cleanups-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6 2008-04-21 15:56:19 -07:00
leds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-23 12:23:45 -07:00
lguest drivers: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:32 -04:00
macintosh Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
mca
md RAID: remove trailing space from printk line 2008-04-21 22:42:58 +00:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial 2008-04-21 16:36:46 -07:00
memstick memstick: convert struct class_device to struct device 2008-04-19 19:10:29 -07:00
message SCSI: convert struct class_device to struct device 2008-04-19 19:10:33 -07:00
mfd Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc 2008-04-21 15:41:27 -07:00
misc [IA64] run drivers/misc/sgi-xp through scripts/checkpatch.pl 2008-04-22 15:08:55 -07:00
mmc mmc: sdio_ops.c should #include "sdio_ops.h" 2008-04-18 20:05:33 +02:00
mtd Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-04-21 15:50:49 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-23 12:23:45 -07:00
nubus
of [POWERPC] i2c: Fix build breakage introduced by OF helpers 2008-04-20 13:03:35 +10:00
oprofile
parisc PCI: remove parisc consumer of the pci global_list 2008-04-20 21:47:01 -07:00
parport avr32: don't offer PARPORT_PC 2008-04-19 20:40:10 -04:00
pci pci/irq: restore mask_bits in msi shutdown -v3 2008-04-29 09:11:12 -07:00
pcmcia Merge branch 'merge-fixes' into devel 2008-04-19 17:17:34 +01:00
pnp pnpacpi: fix potential corruption on "pnpacpi: exceeded the max number of IRQ resources 2" 2008-04-23 12:22:13 -07:00
power
ps3
rapidio
rtc rtc: rtc-sh: Add support for periodic IRQs. 2008-04-18 09:50:01 -07:00
s390 Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
sbus
scsi Merge branch 'for-2.6.26' of git://git.kernel.dk/linux-2.6-block 2008-04-21 16:03:40 -07:00
serial Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-04-21 15:50:49 -07:00
sh
sn
spi
ssb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-04-17 23:56:30 -07:00
tc
telephony
thermal
uio UIO: hold a reference to the device's owner while the device is open 2008-04-19 19:10:18 -07:00
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 2008-04-21 15:44:57 -07:00
video Merge branch 'merge-fixes' into devel 2008-04-19 17:17:34 +01:00
virtio
w1
watchdog Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
xen
zorro
Kconfig
Makefile