linux/drivers
Mike Christie fff9d40ce0 [SCSI] fc class: unblock target after calling terminate callback (take 2)
When we block a rport and the driver implements the terminate
callback we will fail IO that was running quickly. However
IO that was in the scsi_device/block queue sits there until
the dev_loss_tmo fires, and this can make it look like IO is
lost because new IO will get executed but that IO stuck in
the blocked queue sits there for some time longer.

With this patch when the fast io fail tmo fires, we will
fail the blocked IO and any new IO. This patch also allows
all drivers to partially support the fast io fail tmo. If the
terminate io callback is not implemented, we will still fail blocked
IO and any new IO, so multipath can handle that.

This patch also allows the fc and iscsi classes to implement the
same behavior. The timers are just unfornately named differently.

This patch also fixes the problem where drivers were unblocking
the target in their terminate callback, which was needed for
rport removal, but for fast io fail timeout it would cause
IO to bounce arround the scsi/block layer and the LLD queuecommand.
And it for drivers that could have IO stuck but did not have
a terminate callback the unblock calls in the class will fix
them.

v2.
- fix up bit setting style to meet JamesS's pref.
- Broke out new host byte error changes to make it easier to read.
- added JamesS's ack from list.
v1
- initial patch

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Acked-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-10-13 09:28:47 -04:00
..
accessibility braille_console: only register notifiers when the braille console is used 2008-10-02 15:53:13 -07:00
acpi Fix RTC wakealarm sysfs interface breakage. 2008-10-12 11:30:08 -07:00
amba
ata Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6 2008-10-12 11:40:55 -07:00
atm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
auxdisplay
base x86: memory corruption check - cleanup 2008-10-12 15:09:23 +02:00
block Merge branch 'x86-core-v2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-12 12:05:14 -07:00
bluetooth Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-10-08 14:56:41 -07:00
cdrom gdrom: change to use __blk_end_request() 2008-10-09 08:56:21 +02:00
char Merge branch 'x86-core-v2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-12 12:05:14 -07:00
clocksource clocksource, acpi_pm.c: fix check for monotonicity 2008-09-11 11:14:29 +02:00
connector
cpufreq [CPUFREQ] Fix BUG: using smp_processor_id() in preemptible code 2008-10-09 13:52:44 -04:00
cpuidle
crypto crypto: talitos - Avoid consecutive packets going out with same IV 2008-09-14 13:41:19 -07:00
dca
dio
dma dw_dmac: fix copy/paste bug in tasklet 2008-10-03 18:22:18 -07:00
edac
eisa
firewire
firmware ibft: fix target info parsing in ibft module 2008-09-02 19:21:40 -07:00
gpio
gpu drm/radeon: downgrade debug message from info to debug. 2008-09-01 08:51:52 +10:00
hid
hwmon Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
i2c Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-11 10:09:45 -07:00
ide ide: Remove ide_spin_wait_hwgroup() and use special requests instead 2008-10-10 22:39:40 +02:00
ieee1394
infiniband Merge branches 'cma', 'cxgb3', 'ehca', 'ipath', 'ipoib', 'mad', 'misc', 'mlx4', 'mthca' and 'nes' into for-next 2008-10-09 17:41:15 -07:00
input Merge branch 'x86-core-v2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-12 12:05:14 -07:00
isdn mISDN: misc timerdev fixes 2008-09-22 19:18:15 -07:00
leds Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
lguest
macintosh
mca
md Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm 2008-10-10 11:11:47 -07:00
media Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-11 10:09:45 -07:00
memstick memstick: change to use __blk_end_request() 2008-10-09 08:56:20 +02:00
message
mfd Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-11 10:09:45 -07:00
misc eeepc-laptop: Fix hwmon interface 2008-10-09 15:33:57 +02:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 2008-10-12 11:51:57 -07:00
mtd Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
net Merge branch 'x86-core-v2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-12 12:05:14 -07:00
nubus
of
oprofile
parisc
parport sparc: Annotate of_device_id arrays with const or __initdata. 2008-08-31 01:23:17 -07:00
pci Merge branch 'x86/apic' into x86-v28-for-linus-phase4-B 2008-10-11 20:17:36 +02:00
pcmcia Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-11 10:09:45 -07:00
pnp PnP: move pnpacpi/pnpbios_init to after PCI init 2008-10-10 08:00:17 -07:00
power Fix Kconfig dependency for WM97xx battery driver 2008-10-12 12:37:16 -07:00
ps3
rapidio
regulator
rtc Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2008-10-11 09:33:18 -07:00
sbus sparc: Kill sbus mostek RTC driver. 2008-09-03 15:55:32 -07:00
scsi [SCSI] fc class: unblock target after calling terminate callback (take 2) 2008-10-13 09:28:47 -04:00
serial Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
sh
sn
spi orion_spi: fix handling of default transfer speed 2008-10-03 18:22:18 -07:00
ssb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-10-01 06:12:56 -07:00
tc
telephony
thermal
uio
usb Merge branches 'x86/xen', 'x86/build', 'x86/microcode', 'x86/mm-debug-v2', 'x86/memory-corruption-check', 'x86/early-printk', 'x86/xsave', 'x86/ptrace-v2', 'x86/quirks', 'x86/setup', 'x86/spinlocks' and 'x86/signal' into x86/core-v2 2008-10-12 15:50:02 +02:00
video Merge branch 'x86-core-v2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-12 12:05:14 -07:00
virtio
w1
watchdog Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 2008-10-12 11:51:32 -07:00
xen xen: remove unused balloon.h 2008-10-03 10:04:10 +02:00
zorro
Kconfig
Makefile