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ecefe8a975
linux/drivers/scsi
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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
..
aacraid Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-07-15 18:58:04 -07:00
aic7xxx
aic7xxx_old
aic94xx aic94xx: treat firmware data as const 2008-07-10 14:26:15 +01:00
arcmsr
arm [ARM] rpc: acornscsi: update to new style ecard driver 2008-07-03 14:25:57 +01:00
device_handler scsi_dh: Verify "dev" is a sdev before accessing it. 2008-07-16 17:54:21 -07:00
dpt [SCSI] dpt_i2o: Add PROC_IA64 define 2008-06-15 11:12:20 -05:00
ibmvscsi ibmvfc: Add support for collaborative memory overcommit 2008-07-25 15:44:45 +10:00
libsas
lpfc [SCSI] lpfc 8.2.7 : Update version to 8.2.7 2008-07-12 08:22:29 -05:00
megaraid megaraid: BKL pushdown 2008-06-20 14:05:58 -06:00
pcmcia
qla2xxx [SCSI] qla2xxx: Update version number to 8.02.01-k5. 2008-07-26 15:14:47 -04:00
qla4xxx [SCSI] qla4xxx: fix queue depth setting 2008-07-26 15:14:49 -04:00
sym53c8xx_2 [SCSI] sym53c8xx: Fix bogus sym_que_entry re-implementation of container_of 2008-07-12 08:22:37 -05:00
.gitignore
3w-9xxx.c Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
3w-9xxx.h
3w-xxxx.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
3w-xxxx.h
53c700_d.h_shipped
53c700.c [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer 2008-05-02 10:18:22 -05:00
53c700.h
53c700.scr
a100u2w.c Don't crash on IOMMU overflow in A100U2W driver 2008-07-15 14:30:56 -07:00
a100u2w.h
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c
advansys.c
aha152x.c scsi: fix integer as NULL pointer warning 2008-05-23 08:11:07 -07:00
aha152x.h
aha1542.c
aha1542.h
aha1740.c
aha1740.h
aic7xxx_old.c
atari_dma_emul.c
atari_NCR5380.c
atari_scsi.c
atari_scsi.h
atp870u.c scsi: fix integer as NULL pointer warning 2008-05-23 08:11:07 -07:00
atp870u.h
BusLogic.c
BusLogic.h
bvme6000_scsi.c
ch.c Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
constants.c [SCSI] add support for variable length extended commands 2008-05-02 11:33:25 -05:00
dc395x.c
dc395x.h
dmx3191d.c
dpt_i2o.c device create: scsi: convert device_create to device_create_drvdata 2008-07-21 21:54:44 -07:00
dpti.h drivers/scsi/dpt_i2o.c: fix build on alpha 2008-05-08 10:46:56 -07:00
dtc.c
dtc.h
eata_generic.h
eata_pio.c
eata_pio.h
eata.c
esp_scsi.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-07-15 18:58:04 -07:00
esp_scsi.h [SCSI] esp: tidy up target reference counting 2008-06-25 12:36:13 -05:00
fd_mcs.c
fdomain.c
fdomain.h
FlashPoint.c
g_NCR5380_mmio.c
g_NCR5380.c
g_NCR5380.h
gdth_ioctl.h
gdth_proc.c
gdth_proc.h
gdth.c gdth: cdev lock_kernel() pushdown 2008-06-20 14:05:49 -06:00
gdth.h
gvp11.c
gvp11.h
hosts.c driver core: remove KOBJ_NAME_LEN define 2008-07-21 21:54:52 -07:00
hptiop.c scsi: fix integer as NULL pointer warning 2008-05-23 08:11:07 -07:00
hptiop.h
ibmmca.c
ide-scsi.c ide-scsi: remove kmalloced struct request 2008-07-24 22:53:35 +02:00
imm.c
imm.h
in2000.c
in2000.h
initio.c [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer 2008-05-02 10:18:22 -05:00
initio.h
ipr.c [SCSI] ipr: Fix HDIO_GET_IDENTITY oops for SATA devices 2008-07-11 13:45:48 -05:00
ipr.h
ips.c
ips.h
iscsi_tcp.c [SCSI] libiscsi, iscsi_tcp, ib_iser: fix setting of can_queue with old tools. 2008-07-12 08:22:29 -05:00
iscsi_tcp.h [SCSI] iscsi_tcp: handle iscsi_cmd_task rename 2008-07-12 08:22:20 -05:00
jazz_esp.c
Kconfig [SCSI] ibmvfc: IBM Power Virtual Fibre Channel Adapter Client Driver 2008-07-12 08:22:32 -05:00
lasi700.c
libiscsi.c [SCSI] libiscsi, iscsi_tcp, ib_iser: fix setting of can_queue with old tools. 2008-07-12 08:22:29 -05:00
libsrp.c
mac53c94.c
mac53c94.h
mac_esp.c MODULE_LICENSE expects "GPL v2", not "GPLv2" 2008-05-21 16:56:00 -07:00
mac_scsi.c
mac_scsi.h
Makefile [SCSI] ibmvfc: IBM Power Virtual Fibre Channel Adapter Client Driver 2008-07-12 08:22:32 -05:00
megaraid.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
megaraid.h
mesh.c [SCSI] SCSI: remove dev->power.power_state from mesh driver 2008-06-05 09:23:44 -05:00
mesh.h
mvme16x_scsi.c
mvme147.c
mvme147.h
mvsas.c drivers/scsi/mvsas.c: fix printk warnings 2008-05-01 08:04:03 -07:00
ncr53c8xx.c drivers/scsi/ncr53c8xx.c: fix warning 2008-05-01 08:04:02 -07:00
ncr53c8xx.h
NCR53c406a.c
NCR5380.c
NCR5380.h
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32_debug.c
nsp32_io.h
nsp32.c
nsp32.h
osst_detect.h
osst_options.h
osst.c Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
osst.h
pas16.c
pas16.h
ppa.c
ppa.h
ps3rom.c
ql1040_fw.h
ql1280_fw.h
ql12160_fw.h
qla1280.c scsi: fix integer as NULL pointer warning 2008-05-23 08:11:07 -07:00
qla1280.h
qlogicfas408.c
qlogicfas408.h
qlogicfas.c
qlogicpti_asm.c
qlogicpti.c
qlogicpti.h
raid_class.c
script_asm.pl
scsi_debug.c [SCSI] scsi_debug: add support for rotation speed 2008-07-12 08:22:30 -05:00
scsi_devinfo.c
scsi_error.c [SCSI] scsi_dh: add infrastructure for SCSI Device Handlers 2008-06-05 09:23:40 -05:00
scsi_ioctl.c
scsi_lib_dma.c
scsi_lib.c [SCSI] fix shared tag map tag allocation 2008-07-26 15:14:50 -04:00
scsi_logging.h
scsi_module.c
scsi_netlink.c
scsi_priv.h
scsi_proc.c scsi: use non-racy method for proc entries creation 2008-04-29 08:06:21 -07:00
scsi_sas_internal.h
scsi_scan.c [SCSI] make struct scsi_{host,target}_type static 2008-07-12 08:22:36 -05:00
scsi_sysctl.c
scsi_sysfs.c [SCSI] scsi_dh: add infrastructure for SCSI Device Handlers 2008-06-05 09:23:40 -05:00
scsi_tgt_if.c scsi-tgt: BKL pushdown 2008-07-02 15:06:25 -06:00
scsi_tgt_lib.c [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer 2008-05-02 10:18:22 -05:00
scsi_tgt_priv.h
scsi_transport_api.h
scsi_transport_fc_internal.h
scsi_transport_fc.c driver core: remove KOBJ_NAME_LEN define 2008-07-21 21:54:52 -07:00
scsi_transport_iscsi.c driver core: remove KOBJ_NAME_LEN define 2008-07-21 21:54:52 -07:00
scsi_transport_sas.c
scsi_transport_spi.c
scsi_transport_srp_internal.h
scsi_transport_srp.c
scsi_typedefs.h
scsi_wait_scan.c
scsi.c [SCSI] fix shared tag map setup 2008-07-26 15:14:48 -04:00
scsi.h
scsicam.c
sd.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-07-15 18:58:04 -07:00
sd.h [SCSI] sd: Move scsi_disk() accessor function to sd.h 2008-07-12 08:22:31 -05:00
ses.c [SCSI] ses: Fix timeout 2008-06-24 12:02:27 -05:00
sg.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-07-15 18:58:04 -07:00
sgiwd93.c
sim710.c
sni_53c710.c
sr_ioctl.c
sr_vendor.c
sr.c scsi: sr avoids useless buffer allocation 2008-07-04 09:52:14 +02:00
sr.h
st_options.h
st.c [SCSI] st: Remove bogus memset 2008-07-26 15:14:47 -04:00
st.h
stex.c [SCSI] stex: fix queue depth setting 2008-07-26 15:14:49 -04:00
sun3_NCR5380.c
sun3_scsi_vme.c
sun3_scsi.c
sun3_scsi.h
sun3x_esp.c
sun_esp.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
sym53c416.c
sym53c416.h
t128.c
t128.h
tmscsim.c
tmscsim.h
u14-34f.c [SCSI] u14-34f: Fix 32bit only problem 2008-05-02 13:18:06 -05:00
ultrastor.c
ultrastor.h
wd33c93.c
wd33c93.h
wd7000.c
zalon.c
zorro7xx.c