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author | Tejun Heo <tj@kernel.org> | 2011-10-19 16:31:25 +0400 |
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committer | Jens Axboe <axboe@kernel.dk> | 2011-10-19 16:31:25 +0400 |
commit | 315fceee81155ef2aeed9316ca72aeea9347db5c (patch) | |
tree | 91ac02284b6737e6b65e855da771f52dbb3ad32d /block/elevator.c | |
parent | 75eb6c372d41d6d140b893873f6687d78c987a44 (diff) | |
download | linux-315fceee81155ef2aeed9316ca72aeea9347db5c.tar.xz |
block: drop unnecessary blk_get/put_queue() in scsi_cmd_ioctl() and blk_get_tg()
blk_get/put_queue() in scsi_cmd_ioctl() and throtl_get_tg() are
completely bogus. The caller must have a reference to the queue on
entry and taking an extra reference doesn't change anything.
For scsi_cmd_ioctl(), the only effect is that it ends up checking
QUEUE_FLAG_DEAD on entry; however, this is bogus as queue can die
right after blk_get_queue(). Dead queue should be and is handled in
request issue path (it's somewhat broken now but that's a separate
problem and doesn't affect this one much).
throtl_get_tg() incorrectly assumes that q is rcu freed. Also, it
doesn't check return value of blk_get_queue(). If the queue is
already dead, it ends up doing an extra put.
Drop them.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/elevator.c')
0 files changed, 0 insertions, 0 deletions