ieee1394: sbp2: relax SCSI DMA alignment

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
lidonghan · Apr 18, 2008 · a4b47d6 · a4b47d6
1 parent 4b119e2
commit a4b47d6
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
@@ -1985,11 +1985,8 @@ static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
 	lu->sdev = sdev;
 	sdev->allow_restart = 1;
 
-	/*
-	 * Update the dma alignment (minimum alignment requirements for
-	 * start and end of DMA transfers) to be a sector
-	 */
-	blk_queue_update_dma_alignment(sdev->request_queue, 511);
+	/* SBP-2 requires quadlet alignment of the data buffers. */
+	blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
 
 	if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
 		sdev->inquiry_len = 36;