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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2011-05-25 15:52:14 -0500 |
|---|---|---|
| committer | James Bottomley <jbottomley@parallels.com> | 2011-06-02 18:34:43 +0900 |
| commit | e73e079bf128d68284efedeba1fbbc18d78610f9 (patch) | |
| tree | 7477ba6759346155bb784e9719fe68bab89ee88e /drivers/scsi/scsi_scan.c | |
| parent | 1fa7b6a29c61358cc2ca6f64cef4aa0e1a7ca74c (diff) | |
| download | linux-e73e079bf128d68284efedeba1fbbc18d78610f9.tar.gz linux-e73e079bf128d68284efedeba1fbbc18d78610f9.tar.bz2 linux-e73e079bf128d68284efedeba1fbbc18d78610f9.zip | |
[SCSI] Fix oops caused by queue refcounting failure
In certain circumstances, we can get an oops from a torn down device.
Most notably this is from CD roms trying to call scsi_ioctl. The root
cause of the problem is the fact that after scsi_remove_device() has
been called, the queue is fully torn down. This is actually wrong
since the queue can be used until the sdev release function is called.
Therefore, we add an extra reference to the queue which is released in
sdev->release, so the queue always exists.
Reported-by: Parag Warudkar <parag.lkml@gmail.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Diffstat (limited to 'drivers/scsi/scsi_scan.c')
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 58584dc0724a..44e8ca398efa 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -297,7 +297,7 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, kfree(sdev); goto out; } - + blk_get_queue(sdev->request_queue); sdev->request_queue->queuedata = sdev; scsi_adjust_queue_depth(sdev, 0, sdev->host->cmd_per_lun); |