Staging: hv: Simplify blkvsc_init_rw()

Simplyfify blkvsc_init_rw() by using a single scsi command independent of
the start sector.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/blkvsc_drv.c

@@ -305,53 +305,21 @@ static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req)
 
 	blkvsc_req->cmd_len = 16;
 
-	if (blkvsc_req->sector_start > 0xffffffff) {
-		if (rq_data_dir(blkvsc_req->req)) {
-			blkvsc_req->write = 1;
-			blkvsc_req->cmnd[0] = WRITE_16;
-		} else {
-			blkvsc_req->write = 0;
-			blkvsc_req->cmnd[0] = READ_16;
-		}
-
-		blkvsc_req->cmnd[1] |=
-			(blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
-
-		*(unsigned long long *)&blkvsc_req->cmnd[2] =
-				cpu_to_be64(blkvsc_req->sector_start);
-		*(unsigned int *)&blkvsc_req->cmnd[10] =
-				cpu_to_be32(blkvsc_req->sector_count);
-	} else if ((blkvsc_req->sector_count > 0xff) ||
-		   (blkvsc_req->sector_start > 0x1fffff)) {
-		if (rq_data_dir(blkvsc_req->req)) {
-			blkvsc_req->write = 1;
-			blkvsc_req->cmnd[0] = WRITE_10;
-		} else {
-			blkvsc_req->write = 0;
-			blkvsc_req->cmnd[0] = READ_10;
-		}
-
-		blkvsc_req->cmnd[1] |=
-			(blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
-
-		*(unsigned int *)&blkvsc_req->cmnd[2] =
-				cpu_to_be32(blkvsc_req->sector_start);
-		*(unsigned short *)&blkvsc_req->cmnd[7] =
-				cpu_to_be16(blkvsc_req->sector_count);
+	if (rq_data_dir(blkvsc_req->req)) {
+		blkvsc_req->write = 1;
+		blkvsc_req->cmnd[0] = WRITE_16;
 	} else {
-		if (rq_data_dir(blkvsc_req->req)) {
-			blkvsc_req->write = 1;
-			blkvsc_req->cmnd[0] = WRITE_6;
-		} else {
-			blkvsc_req->write = 0;
-			blkvsc_req->cmnd[0] = READ_6;
-		}
-
-		*(unsigned int *)&blkvsc_req->cmnd[1] =
-				cpu_to_be32(blkvsc_req->sector_start) >> 8;
-		blkvsc_req->cmnd[1] &= 0x1f;
-		blkvsc_req->cmnd[4] = (unsigned char)blkvsc_req->sector_count;
+		blkvsc_req->write = 0;
+		blkvsc_req->cmnd[0] = READ_16;
 	}
+
+	blkvsc_req->cmnd[1] |=
+	(blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
+
+	*(unsigned long long *)&blkvsc_req->cmnd[2] =
+	cpu_to_be64(blkvsc_req->sector_start);
+	*(unsigned int *)&blkvsc_req->cmnd[10] =
+	cpu_to_be32(blkvsc_req->sector_count);
 }