X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fscsi%2Flibata-scsi.c;h=38a895ebe8269b75394b77b0a45e0b73be7e89c5;hb=193515d51ccb363165d6b09e9ba5c21089e34bad;hp=248baae9648656f762bd3f15436effee84e4511f;hpb=94b166a7cbc232df279e1f7d5a8acfb6b8d02d59;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 248baae9648..38a895ebe82 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -37,9 +37,9 @@
 #include <linux/blkdev.h>
 #include <linux/spinlock.h>
 #include <scsi/scsi.h>
-#include "scsi.h"
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_device.h>
+#include <scsi/scsi_request.h>
 #include <linux/libata.h>
 #include <linux/hdreg.h>
 #include <asm/uaccess.h>
@@ -355,10 +355,10 @@ struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
 		qc->scsidone = done;
 
 		if (cmd->use_sg) {
-			qc->sg = (struct scatterlist *) cmd->request_buffer;
+			qc->__sg = (struct scatterlist *) cmd->request_buffer;
 			qc->n_elem = cmd->use_sg;
 		} else {
-			qc->sg = &qc->sgent;
+			qc->__sg = &qc->sgent;
 			qc->n_elem = 1;
 		}
 	} else {
@@ -702,6 +702,16 @@ int ata_scsi_slave_config(struct scsi_device *sdev)
 			 */
 			blk_queue_max_sectors(sdev->request_queue, 2048);
 		}
+
+		/*
+		 * SATA DMA transfers must be multiples of 4 byte, so
+		 * we need to pad ATAPI transfers using an extra sg.
+		 * Decrement max hw segments accordingly.
+		 */
+		if (dev->class == ATA_DEV_ATAPI) {
+			request_queue_t *q = sdev->request_queue;
+			blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
+		}
 	}
 
 	return 0;	/* scsi layer doesn't check return value, sigh */