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James Smart c7a841f3ac [SCSI] bsg: correct fault if queue object removed while dev_t open 
This patch corrects an issue in bsg that results in a general protection
fault if an LLD is removed while an application is using an open file
handle to a bsg device, and the application issues an ioctl. The fault
occurs because the class_dev is NULL, having been cleared in
bsg_unregister_queue() when the driver was removed.  With this
patch, a check is made for the class_dev, and the application
will receive ENXIO if the related object is gone.

Signed-off-by: Carl Lajeunesse <carl.lajeunesse@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-12-09 09:41:14 -06:00
..
blk-cgroup.c Merge branch 'for-2.6.37/core' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:00:32 -07:00
blk-cgroup.h blkio-throttle: limit max iops value to UINT_MAX 2010-10-01 21:16:41 +02:00
blk-core.c block: remove REQ_HARDBARRIER 2010-11-10 14:54:09 +01:00
blk-exec.c block: Prevent hang_check firing during long I/O 2010-09-24 15:52:09 +02:00
blk-flush.c block: remove BLKDEV_IFL_WAIT 2010-09-16 20:52:58 +02:00
blk-integrity.c block: Fix double free in blk_integrity_unregister 2010-10-15 15:49:18 +02:00
blk-ioc.c block: remove unused copy_io_context() 2010-11-11 13:40:11 +01:00
blk-iopoll.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
blk-lib.c block: remove BLKDEV_IFL_WAIT 2010-09-16 20:52:58 +02:00
blk-map.c block: check for proper length of iov entries in blk_rq_map_user_iov() 2010-11-10 14:40:42 +01:00
blk-merge.c Revert "block: fix accounting bug on cross partition merges" 2010-10-24 22:06:02 +02:00
blk-settings.c Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
blk-softirq.c generic-ipi: remove CSD_FLAG_WAIT 2009-02-25 14:13:44 +01:00
blk-sysfs.c block: fix use-after-free bug in blk throttle code 2010-10-23 20:40:26 +02:00
blk-tag.c 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
blk-throttle.c blk-throttle: Fix calculation of max number of WRITES to be dispatched 2010-11-15 19:32:42 +01:00
blk-timeout.c block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer 2010-04-21 17:42:08 +02:00
blk.h Revert "block: fix accounting bug on cross partition merges" 2010-10-24 22:06:02 +02:00
bsg.c [SCSI] bsg: correct fault if queue object removed while dev_t open 2010-12-09 09:41:14 -06:00
cfq-iosched.c Merge branch 'for-2.6.37/core' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:00:32 -07:00
cfq.h blk-cgroup: Prepare the base for supporting more than one IO control policies 2010-09-16 08:42:04 +02:00
compat_ioctl.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
deadline-iosched.c block: convert to pos and nr_sectors accessors 2009-05-11 09:50:54 +02:00
elevator.c block: remove REQ_HARDBARRIER 2010-11-10 14:54:09 +01:00
genhd.c Revert "block: fix accounting bug on cross partition merges" 2010-10-24 22:06:02 +02:00
ioctl.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
Kconfig blkio: Core implementation of throttle policy 2010-09-16 08:42:52 +02:00
Kconfig.iosched blk-cgroup: config options re-arrangement 2010-04-26 19:27:56 +02:00
Makefile Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
noop-iosched.c 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_ioctl.c block: take care not to overflow when calculating total iov length 2010-11-10 14:40:42 +01:00