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OpenCloudOS-Kernel
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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
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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
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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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-20 17:43:29 -07:00
cdrom cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of buffers on stack) 2008-07-04 09:52:14 +02:00
char Merge git://git.infradead.org/embedded-2.6 2008-07-25 12:02:08 -07:00
clocksource Fix printk format warning in clocksource/acpi_pm.c 2008-07-15 11:01:39 -07:00
connector
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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 sysdev: Pass the attribute to the low level sysdev show/store function 2008-07-21 21:55:02 -07:00
crypto crypto: ixp4xx - Select CRYPTO_AUTHENC 2008-07-13 20:12:11 +08:00
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 dio: use dio_match_device() in dio_bus_match() 2008-07-20 17:24:40 -07:00
dma I/OAT: I/OAT version 3.0 support 2008-07-22 17:30:57 -07:00
edac edac: mpc85xx fix pci ofdev 2nd pass 2008-07-25 10:53:49 -07:00
eisa driver core: remove DEVICE_NAME_SIZE define 2008-07-21 21:54:53 -07:00
firewire Merge branch 'sbp2-spindown' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2008-07-15 12:39:44 -07:00
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 drm/radeon: fixup issue with radeon and PAT support. 2008-07-15 15:48:05 +10:00
hid Merge branches 'upstream' and 'upstream-fixes' into for-linus 2008-07-23 15:26:10 +02:00
hwmon device create: hwmon: convert device_create to device_create_drvdata 2008-07-21 21:54:42 -07:00
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 device create: macintosh: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
mca driver core: remove DEVICE_NAME_SIZE define 2008-07-21 21:54:53 -07:00
md Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm 2008-07-21 10:30:10 -07:00
media PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
memstick driver core: remove DEVICE_ID_SIZE define 2008-07-21 21:54:53 -07:00
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
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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
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parisc parisc-eisa_eeprom: BKL pushdown 2008-07-02 15:06:24 -06:00
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 PNPACPI: add support for HP vendor-specific CCSR descriptors 2008-07-16 23:27:07 +02:00
power drivers/power: fix platform driver hotplug/coldplug 2008-07-25 10:53:28 -07:00
ps3
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rapidio rapidio: fix device reference counting 2008-07-10 18:04:43 -07:00
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 sparc64: fix up bus_id changes in sparc core code 2008-07-21 21:55:03 -07:00
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
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sn
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spi spi: au1550_spi: improve pio transfer mode 2008-07-24 10:47:30 -07:00
ssb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-08 16:30:17 -07:00
tc
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telephony ixj: push BKL into driver and wrap ioctls 2008-07-25 10:53:43 -07:00
thermal
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uio UIO: add generic UIO platform driver 2008-07-21 21:54:55 -07:00
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 w1/ds2482: Convert to a new-style driver 2008-07-16 19:30:07 +02:00
watchdog remove the v850 port 2008-07-24 10:47:24 -07:00
xen sysdev: Pass the attribute to the low level sysdev show/store function 2008-07-21 21:55:02 -07:00
zorro move memory_read_from_buffer() from fs.h to string.h 2008-07-24 10:47:13 -07:00
Kconfig
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Makefile gpiolib: allow user-selection 2008-07-25 10:53:30 -07:00