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[SCSI] gdth: don't map zero-length requests 

Don't map zero-length requests in gdth, zome architectures don't like
that in their dma mapping routines.

[ I'm pretty sure Jens posted this before, but for some reason it got
  forgotten  --hch ]

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Jenx Axboe 2006-02-05 16:36:23 +01:00 committed by
parent f9876f0b67
commit 40cdc840dc
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/gdth.c
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@ -2816,7 +2816,7 @@ static int gdth_fill_cache_cmd(int hanum,Scsi_Cmnd *scp,ushort hdrive)
}
#endif
} else {
} else if (scp->request_bufflen) {
scp->SCp.Status = GDTH_MAP_SINGLE;
scp->SCp.Message = (read_write == 1 ?
PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);