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[SCSI] fix oops in scsi_release_buffers()
I found one other thing that needs to be fixed. The call to scsi_release_buffers in scsi_unprep_request causes an oops, because the sgtable has already been freed in scsi_io_completion. The following patch is needed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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@ -118,7 +118,6 @@ static void scsi_unprep_request(struct request *req)
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req->flags &= ~REQ_DONTPREP;
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req->special = (req->flags & REQ_SPECIAL) ? cmd->sc_request : NULL;
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scsi_release_buffers(cmd);
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scsi_put_command(cmd);
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}
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@ -1512,7 +1511,6 @@ static void scsi_request_fn(struct request_queue *q)
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* cases (host limits or settings) should run the queue at some
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* later time.
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*/
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scsi_unprep_request(req);
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spin_lock_irq(q->queue_lock);
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blk_requeue_request(q, req);
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sdev->device_busy--;
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