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ecefe8a975
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Mike Christie ecefe8a975 [SCSI] fix shared tag map tag allocation 
When drivers use a shared tag map we can end up with more requests
than tags, because the tag map is shost->can_queue tags and there
can be sdevs * sdev->queue_depth requests. In scsi_request_fn
if tag allocation fails we just drop down to just dequeueing the
tag without a tag. The problem is that drivers using the shared tag
map rely on a valid tag always being set, because it will use the
tag number to lookup commands later.

This patch has us check if we got a valid tag when the host lock
is held right before we check if the host queue is ready. We do the
check here because to allocate the tag we need the q lock, but
if the tag is bad we want to add the device/q onto the starved list
which requires the host lock.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-07-26 15:14:50 -04:00
..
accessibility
acpi Merge branch 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-acpi-2.6 2008-07-24 13:57:37 -07:00
amba
ata Fix ahci driver 'flags' type 2008-07-25 10:56:36 -07:00
atm atm: [fore200e] use MODULE_FIRMWARE() and other suggested cleanups 2008-07-23 20:29:21 -07:00
auxdisplay auxdisplay: small cleanups 2008-07-24 10:47:41 -07:00
base firmware: use memory_read_from_buffer() 2008-07-25 10:53:44 -07:00
block aoe: convert emsgs_sema into a completion 2008-07-25 10:53:45 -07:00
bluetooth
cdrom
char Merge git://git.infradead.org/embedded-2.6 2008-07-25 12:02:08 -07:00
clocksource
connector
cpufreq Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-07-23 18:37:44 -07:00
cpuidle
crypto
dca Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2008-07-23 12:03:18 -07:00
dio
dma
edac edac: mpc85xx fix pci ofdev 2nd pass 2008-07-25 10:53:49 -07:00
eisa
firewire
firmware dell_rbu: use memory_read_from_buffer() 2008-07-25 10:53:44 -07:00
gpio gpio: max732x driver 2008-07-25 10:53:30 -07:00
gpu
hid Merge branches 'upstream' and 'upstream-fixes' into for-linus 2008-07-23 15:26:10 +02:00
hwmon
i2c gpiolib: allow user-selection 2008-07-25 10:53:30 -07:00
ide ide: use proper printk() KERN_* levels in ide-probe.c 2008-07-24 22:53:36 +02:00
ieee1394 PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2008-07-24 12:56:07 -07:00
input Undo duplicate "m68k: drivers/input/serio/hp_sdc.c needs <linux/semaphore.h>" 2008-07-25 09:19:36 -07:00
isdn Rename WARN() to WARNING() to clear the namespace 2008-07-25 10:53:29 -07:00
leds leds: Ensure led->trigger is set earlier 2008-07-23 09:49:56 +01:00
lguest virtio: Add transport feature handling stub for virtio_ring. 2008-07-25 12:06:14 +10:00
macintosh
mca
md
media PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
memstick
message I2O: handle sysfs_create_link() failures 2008-07-24 10:47:30 -07:00
mfd MFD_TC6393XB is ARM-only 2008-07-25 17:39:36 -07:00
misc drivers/misc/phantom: note PCI 2008-07-25 10:53:44 -07:00
mmc sdhci: highmem capable PIO routines 2008-07-23 14:42:09 +02:00
mtd Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6 2008-07-25 11:02:17 -07:00
net Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2008-07-25 11:08:17 -07:00
nubus
of Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2008-07-25 11:08:17 -07:00
oprofile
parisc
parport parport: fix platform driver hotplug/coldplug 2008-07-25 10:53:28 -07:00
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2008-07-24 13:57:13 -07:00
pcmcia PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
pnp
power drivers/power: fix platform driver hotplug/coldplug 2008-07-25 10:53:28 -07:00
ps3
rapidio
rtc rtc-vr41xx: add irq_set_freq() and irq_set_state() 2008-07-24 10:47:34 -07:00
s390 virtio: Add transport feature handling stub for virtio_ring. 2008-07-25 12:06:14 +10:00
sbus
scsi [SCSI] fix shared tag map tag allocation 2008-07-26 15:14:50 -04:00
serial cpm1: don't send break on TX_STOP, don't interrupt RX/TX when adjusting termios parameters 2008-07-24 10:47:30 -07:00
sh
sn
spi spi: au1550_spi: improve pio transfer mode 2008-07-24 10:47:30 -07:00
ssb
tc
telephony ixj: push BKL into driver and wrap ioctls 2008-07-25 10:53:43 -07:00
thermal
uio
usb Rename WARN() to WARNING() to clear the namespace 2008-07-25 10:53:29 -07:00
video Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight 2008-07-24 12:16:40 -07:00
virtio virtio: Add transport feature handling stub for virtio_ring. 2008-07-25 12:06:14 +10:00
w1
watchdog remove the v850 port 2008-07-24 10:47:24 -07:00
xen
zorro move memory_read_from_buffer() from fs.h to string.h 2008-07-24 10:47:13 -07:00
Kconfig
Makefile gpiolib: allow user-selection 2008-07-25 10:53:30 -07:00