[SCSI] gdth: don't map zero-length requests
authorJenx Axboe <axboe@suse.de>
Sun, 5 Feb 2006 15:36:23 +0000 (16:36 +0100)
committer <jejb@mulgrave.il.steeleye.com> <>
Sun, 5 Feb 2006 18:59:29 +0000 (12:59 -0600)
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>
drivers/scsi/gdth.c

index bd3ffdf6c800088d5e6de6b915a6727eaa912757..62e3cda859afccb44dda94dc9c2a6d2ab0a18d31 100644 (file)
@@ -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);