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[SCSI] scsi_sysfs: restore prep_fn when ULD is removed

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A recent bug report:

http://bugzilla.kernel.org/show_bug.cgi?id=9674

Was caused because the ULDs now set their own prep functions, but
don't necessarily reset the prep function back to the SCSI default
when they are removed.  This leads to panics if commands are sent to
the device after the module is removed because the prep_fn is still
pointing to the old module code.  The fix for this is to implement a
bus remove method that resets the prep_fn pointer correctly before
calling the ULD specific driver remove method.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley
2008-01-02 11:14:30 -06:00
parent dc512814b5
commit 751bf4d786
3 changed files with 21 additions and 1 deletions
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2
drivers/scsi/scsi_lib.c
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@@ -1332,7 +1332,7 @@ int scsi_prep_return(struct request_queue *q, struct request *req, int ret)
}
EXPORT_SYMBOL(scsi_prep_return);
static int scsi_prep_fn(struct request_queue *q, struct request *req)
int scsi_prep_fn(struct request_queue *q, struct request *req)
{
struct scsi_device *sdev = q->queuedata;
int ret = BLKPREP_KILL;