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[SCSI] sd: fix medium-removal bug 

Commit 409f3499a2 (scsi/sd: remove big
kernel lock) introduced a bug in the sd_release routine.  Medium
removal should be allowed when the number of open file references
drops to 0, not when it becomes non-zero.

This patch (as1414) adjusts the test to fix the bug.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Alan Stern 2010-09-07 11:27:52 -04:00 committed by James Bottomley
parent 0fb576d825
commit 7e44331240
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/sd.c
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@ -870,7 +870,7 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
if (atomic_dec_return(&sdkp->openers) && sdev->removable) { if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
if (scsi_block_when_processing_errors(sdev)) if (scsi_block_when_processing_errors(sdev))
scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
} }