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[SCSI] QLOGICPTI: Do not unmap DMA unless we actually mapped something.
authorDavid S. Miller <davem@sunset.davemloft.net>
Sat, 14 Apr 2007 17:29:10 +0000 (10:29 -0700)
committerDavid S. Miller <davem@sunset.davemloft.net>
Sat, 14 Apr 2007 17:29:10 +0000 (10:29 -0700)
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>

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