firewire: fw-sbp2: relax SCSI DMA alignment

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index c7aba5cff5d2..ea62e825a3b6 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -1518,11 +1518,8 @@ static int sbp2_scsi_slave_alloc(struct scsi_device *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->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
                 sdev->inquiry_len = 36;