---

yaml --- r: 343727 b: refs/heads/master c: 53ad570 h: refs/heads/master i: 343725: 4985791 343723: 2204391 343719: d7ac7e0 343711: 3a92176 v: v3
git-mirror · Nov 27, 2012 · 342cbc5 · 342cbc5
1 parent b13009a
commit 342cbc5
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Showing 3 changed files with 5 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0b4334473d48aa18e8448f9f718f1dcd0398c550
+refs/heads/master: 53ad570be625045aba3ae7de8d82401364c655e1
diff --git a/trunk/drivers/scsi/sd.c b/trunk/drivers/scsi/sd.c
@@ -1011,7 +1011,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 		SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff;
 		SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff;
 		SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
-	} else if (block > 0xffffffff) {
+	} else if (sdp->use_16_for_rw) {
 		SCpnt->cmnd[0] += READ_16 - READ_6;
 		SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
 		SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
@@ -2203,6 +2203,8 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
 		}
 	}
 
+	sdp->use_16_for_rw = (sdkp->capacity > 0xffffffff);
+
 	/* Rescale capacity to 512-byte units */
 	if (sector_size == 4096)
 		sdkp->capacity <<= 3;

diff --git a/trunk/include/scsi/scsi_device.h b/trunk/include/scsi/scsi_device.h
@@ -137,6 +137,7 @@ struct scsi_device {
 	unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
 	unsigned no_report_opcodes:1;	/* no REPORT SUPPORTED OPERATION CODES */
 	unsigned no_write_same:1;	/* no WRITE SAME command */
+	unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */
 	unsigned skip_ms_page_8:1;	/* do not use MODE SENSE page 0x08 */
 	unsigned skip_ms_page_3f:1;	/* do not use MODE SENSE page 0x3f */
 	unsigned skip_vpd_pages:1;	/* do not read VPD pages */