Jan Glauber b02f0c2ea2 [S390] qdio: clear shared DSCI before scheduling the queue handler ... The following race can occur with qdio devices that use the shared device state change indicator: Device (Shared DSCI) CPU0 CPU1 =============================================================================== 1. DSCI 0 => 1, INT pending 2. Thinint handler * si_used = 1 * Inbound tasklet_schedule * DSCI 1 => 0 3. DSCI 0 => 1, INT pending 4. Thinint handler * si_used = 1 * Inbound tasklet_schedu le => NOP 5. Inbound tasklet run 6. DSCI = 1, INT surpressed 7. DSCI 1 => 0 The race would lead to a stall where new data in the input queue is not recognized so the device stops working in case of no further traffic. Fix the race by resetting the DSCI before scheduling the inbound tasklet so the device generates an interrupt if new data arrives in the above scenario in step 6. Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2011-07-24 10:48:00 +02:00
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accessibility	…
acpi	…
amba	…
ata	…
atm	…
auxdisplay	…
base	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap	2011-07-23 11:14:47 -07:00
bcma	…
block	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-07-22 19:02:39 -07:00
bluetooth	…
cdrom	…
char	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-07-22 19:02:39 -07:00
clk	…
clocksource	Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-07-23 10:34:47 -07:00
connector	Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc	2011-07-22 15:06:50 -07:00
cpufreq	…
cpuidle	…
crypto	…
dca	…
dio	…
dma	Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6	2011-07-22 14:52:44 -07:00
edac	…
eisa	…
firewire	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6	2011-07-22 14:49:48 -07:00
firmware	…
gpio	Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6	2011-07-22 14:50:57 -07:00
gpu	Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6	2011-07-21 11:07:18 -07:00
hid	Merge branches 'roccat', 'upstream' and 'wiimote' into for-linus	2011-07-22 22:47:08 +02:00
hwmon	…
hwspinlock	…
i2c	…
ide	…
idle	…
ieee802154	…
infiniband	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband	2011-07-22 14:50:12 -07:00
input	Merge branch 'timers-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-07-22 16:51:56 -07:00
iommu	…
isdn	…
leds	Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6	2011-07-22 14:50:57 -07:00
lguest	lguest: Fix in/out emulation	2011-07-22 14:39:51 +09:30
macintosh	drivers: fix up various ->llseek() implementations	2011-07-20 20:47:58 -04:00
mca	…
md	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-07-22 19:02:39 -07:00
media	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-21 13:38:42 -07:00
memstick	…
message	…
mfd	…
misc	…
mmc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2011-07-22 14:43:13 -07:00
mtd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-07-22 19:02:39 -07:00
net	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband	2011-07-22 14:50:12 -07:00
nfc	…
nubus	…
of	Merge branch 'of-pci' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2011-07-22 14:54:02 -07:00
oprofile	perf: Remove the nmi parameter from the oprofile_perf backend	2011-07-21 20:41:58 +02:00
parisc	…
parport	…
pci	Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-07-22 16:39:42 -07:00
pcmcia	…
platform	…
pnp	…
power	…
pps	…
ps3	…
ptp	…
rapidio	…
regulator	regulator: Convert tps65023 to use regmap API	2011-07-23 07:57:02 +01:00
rtc	Merge branch 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-07-22 16:52:39 -07:00
s390	[S390] qdio: clear shared DSCI before scheduling the queue handler	2011-07-24 10:48:00 +02:00
sbus	…
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2011-07-23 11:13:11 -07:00
sfi	…
sh	switch assorted clock drivers to debugfs_remove_recursive()	2011-07-20 20:47:51 -04:00
sn	…
spi	Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6	2011-07-22 14:52:44 -07:00
ssb	…
staging	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-07-22 19:02:39 -07:00
target	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2011-07-23 11:13:11 -07:00
tc	…
telephony	…
thermal	…
tty	Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6	2011-07-22 14:53:38 -07:00
uio	…
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-07-22 19:02:39 -07:00
uwb	…
vhost	vhost: handle wrap around in # of bufs math	2011-07-21 10:48:27 +03:00
video	fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers	2011-07-20 20:47:59 -04:00
virtio	virtio: expose for non-virtualization users too	2011-07-23 16:20:30 +09:30
vlynq	…
w1	…
watchdog	…
xen	Merge branch 'stable/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen	2011-07-22 13:45:15 -07:00
zorro	…
Kconfig	virtio: expose for non-virtualization users too	2011-07-23 16:20:30 +09:30
Makefile	Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-07-22 16:39:42 -07:00