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authorDavid S. Miller <davem@sunset.davemloft.net>2007-04-14 10:29:10 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-14 10:29:10 -0700
commit8d3ee2cb0ab59f78fdc801ede7db15ef47387bd0 (patch)
tree004a3b3b5f0d1bc9a32d27bc7f555bae5a04112a
parentd791d413fd8527aa6b130882cc84d52aee0fe980 (diff)
downloadlinux-sh-8d3ee2cb0ab59f78fdc801ede7db15ef47387bd0.tar.gz
[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 <davem@davemloft.net>
-rw-r--r--drivers/scsi/qlogicpti.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
index 9b827ceec501..9f10689905a8 100644
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -1281,7 +1281,7 @@ static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
(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,