From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sun, 27 Jan 2008 21:31:27 +0000 (+0100)
Subject: firewire: fw-sbp2: relax SCSI DMA alignment
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8ac3a47cab32e5e5a40de4bc210b5b0063bf6e84;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

firewire: fw-sbp2: relax SCSI DMA alignment

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

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;