-stable review patch. If anyone has any objections, please let us know.
------------------
From: David Miller <[email protected]>
[SCSI] QLOGICPTI: Do not unmap DMA unless we actually mapped something.
We only map DMA when cmd->request_bufflen is non-zero for non-sg
buffers, we thus should make the same check when unmapping.
Based upon a report from Pasi Pirhonen.
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/scsi/qlogicpti.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -1281,7 +1281,7 @@ static struct scsi_cmnd *qlogicpti_intr_
(struct scatterlist *)Cmnd->request_buffer,
Cmnd->use_sg,
Cmnd->sc_data_direction);
- } else {
+ } else if (Cmnd->request_bufflen) {
sbus_unmap_single(qpti->sdev,
(__u32)((unsigned long)Cmnd->SCp.ptr),
Cmnd->request_bufflen,
--
-
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