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2f2eb58762
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Christof Schmitt 2f2eb58762 [SCSI] Allow FC LLD to fast-fail scsi eh by introducing new eh return 
If the scsi eh is running and then a FC LLD calls
fc_remote_port_delete, the SCSI commands sent from the eh will fail.
To prevent this, a FC LLD can call fc_block_scsi_eh from the eh
callback, blocking the eh thread until the dev_loss_tmo fires or the
remote port is available again.

If (e.g. for a multipathing setup) the dev_loss_tmo is set to a very
large value, thus preventing the scsi device removal , the scsi eh can
block for a long time. For multipathing, the fast_io_fail_tmo is then
set to a low value to detect path problems sooner.

This patch introduces a new return code FAST_IO_FAIL. The function
fc_block_scsi_eh now returns FAST_IO_FAIL when the fast_io_fail_tmo
fires. This indicates that the LLD terminated all pending I/O requests
and there are no more pending SCSI commands for the scsi eh to wait
for. This return code can be passed back to the scsi eh to stop the
escalation and finish the recovery process for this device.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:49:33 -05:00
..
accessibility
acpi Merge branches 'battery', 'bugzilla-14667', 'bugzilla-15096', 'bugzilla-15480', 'bugzilla-15521', 'bugzilla-15605', 'gpe-reference-counters', 'misc', 'pxm-fix' and 'video-random-key' into release 2010-04-06 17:06:22 -04:00
amba
ata libata: unlock HPA if device shrunk 2010-04-06 10:55:33 -04:00
atm include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
auxdisplay include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
base nodemask: include slab.h from drivers/base/node.c 2010-04-07 06:41:41 +09:00
block cciss: unlock on error path 2010-04-07 08:38:03 -07:00
bluetooth include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cdrom block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
char hvc_console: Fix race between hvc_close and hvc_remove 2010-04-08 09:46:20 +09:30
clocksource include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
connector include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cpufreq include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cpuidle include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
crypto include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dca include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dio
dma include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
edac include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
eisa eisa: fix coding style for eisa bus code 2010-03-06 11:26:32 -08:00
firewire include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
firmware Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip 2010-04-07 11:02:23 -07:00
gpio drivers/gpio/timbgpio.c: add missing unlock 2010-04-07 08:38:02 -07:00
gpu Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
hid Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
hwmon include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
i2c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6 2010-04-08 07:45:36 -07:00
idle include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ieee1394 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ieee802154
infiniband include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
input include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
isdn include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
leds include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
lguest include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
macintosh device_attributes: add sysfs_attr_init() for dynamic attributes 2010-04-07 08:38:03 -07:00
mca
md include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
media device_attributes: add sysfs_attr_init() for dynamic attributes 2010-04-07 08:38:03 -07:00
memstick include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
message [SCSI] mptfusion: Bump version 03.04.15 2010-04-11 09:24:14 -05:00
mfd include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
misc Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
mmc omap hsmmc: fix a bug in card remove scenario 2010-04-07 08:38:03 -07:00
mtd include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-06 08:34:06 -07:00
nubus include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
of Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
oprofile include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
parisc include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
parport include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
pci Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
pcmcia Merge branch 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-04-06 13:03:52 -07:00
platform device_attributes: add sysfs_attr_init() for dynamic attributes 2010-04-07 08:38:03 -07:00
pnp Merge branches 'battery', 'bugzilla-14667', 'bugzilla-15096', 'bugzilla-15480', 'bugzilla-15521', 'bugzilla-15605', 'gpe-reference-counters', 'misc', 'pxm-fix' and 'video-random-key' into release 2010-04-06 17:06:22 -04:00
power include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
pps include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ps3 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
rapidio
regulator include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
rtc rtc-mxc: multiple fixes in rtc-mxc probe method 2010-04-07 08:38:05 -07:00
s390 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sbus include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
scsi [SCSI] Allow FC LLD to fast-fail scsi eh by introducing new eh return 2010-04-11 09:49:33 -05:00
serial Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
sfi
sh include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sn include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
spi include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ssb include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
staging staging/otus: include slab.h from usbdrv.h 2010-04-05 11:23:16 +09:00
tc include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
telephony
thermal drivers/thermal/thermal_sys.c: fix 'key f70f4b50 not in .data' in thermal_sys 2010-04-07 08:38:03 -07:00
uio include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
usb Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
uwb include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
vhost include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
video mb862xxfb: update Valentin's email address 2010-04-07 08:38:04 -07:00
virtio include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
vlynq include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
w1 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
watchdog Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 2010-04-06 09:56:40 -07:00
xen include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
zorro
Kconfig MFGPT: move clocksource menu 2010-03-06 11:26:28 -08:00
Makefile Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00