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authorMartin K. Petersen <martin.petersen@oracle.com>2012-04-14 23:01:28 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-15 11:08:53 -0700
commit919f797a4c9c22ff5ec059744dba364dc600ece2 (patch)
tree6f2183e84c2bcfdc6eebed82319a4a21b871bdea /drivers
parentbfecc60d8f6715ec6b38aa29c4f5a3570415dae0 (diff)
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SCSI: Fix error handling when no ULD is attached
Commit 18a4d0a22ed6 ("[SCSI] Handle disk devices which can not process medium access commands") introduced a bug in which we would attempt to dereference the scsi driver even when the device had no ULD attached. Ensure that a driver is registered and make the driver accessor function more resilient to errors during device discovery. Reported-by: Elric Fu <elricfu1@gmail.com> Reported-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/scsi_error.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 2cfcbffa41fd..386f0c53bea7 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -835,7 +835,7 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd,
scsi_eh_restore_cmnd(scmd, &ses);
- if (sdrv->eh_action)
+ if (sdrv && sdrv->eh_action)
rtn = sdrv->eh_action(scmd, cmnd, cmnd_size, rtn);
return rtn;