[SCSI] libata: fix corruption induced by relaxed DMA alignment in SCSI

[linux-2.6-omap-h63xx.git] / drivers / ata / libata-scsi.c

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 4bb268b9aaeb524baf7d1465f6f1d84f8c6c660e..bc5cf6b8a4b885a32569ea6166cdba4a4ec5ee3c 100644 (file)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -824,9 +824,6 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev)
         * requests.
         */
        sdev->max_device_blocked = 1;
-
-       /* set the min alignment */
-       blk_queue_update_dma_alignment(sdev->request_queue, ATA_DMA_PAD_SZ - 1);
 }
 
 static void ata_scsi_dev_config(struct scsi_device *sdev,
@@ -842,7 +839,14 @@ static void ata_scsi_dev_config(struct scsi_device *sdev,
        if (dev->class == ATA_DEV_ATAPI) {
                struct request_queue *q = sdev->request_queue;
                blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
-       }
+
+               /* set the min alignment */
+               blk_queue_update_dma_alignment(sdev->request_queue,
+                                              ATA_DMA_PAD_SZ - 1);
+       } else
+               /* ATA devices must be sector aligned */
+               blk_queue_update_dma_alignment(sdev->request_queue,
+                                              ATA_SECT_SIZE - 1);
 
        if (dev->flags & ATA_DFLAG_AN)
                set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);