drivers, block: virtio_blk: Replace cryptic number with the macro

It is easier to figure out the context by reading SCSI_SENSE_BUFFERSIZE
instead of plain '96'.

Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 33a48a80c7e82a6a949c6191dee5321add634377..079c08808d8a41b7fe5d27b00d389579ffae0930 100644 (file)
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -7,6 +7,7 @@
 #include <linux/virtio_blk.h>
 #include <linux/scatterlist.h>
 #include <linux/string_helpers.h>
+#include <scsi/scsi_cmnd.h>
 
 #define PART_BITS 4
 
@@ -146,7 +147,7 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
        num = blk_rq_map_sg(q, vbr->req, vblk->sg + out);
 
        if (vbr->req->cmd_type == REQ_TYPE_BLOCK_PC) {
-               sg_set_buf(&vblk->sg[num + out + in++], vbr->req->sense, 96);
+               sg_set_buf(&vblk->sg[num + out + in++], vbr->req->sense, SCSI_SENSE_BUFFERSIZE);
                sg_set_buf(&vblk->sg[num + out + in++], &vbr->in_hdr,
                           sizeof(vbr->in_hdr));
        }