[PATCH] virtio-blk: fixup coccinelle warnings

[cgel . zte]

From: Ye Guojin <ye.guojin@xxxxxxxxxx>

coccicheck complains about the use of snprintf() in sysfs show
functions:
WARNING  use scnprintf or sprintf

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Ye Guojin <ye.guojin@xxxxxxxxxx>
---
 drivers/block/virtio_blk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 303caf2d17d0..8a71b2f9f4b7 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -624,7 +624,7 @@ cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
 	u8 writeback = virtblk_get_cache_mode(vblk->vdev);
 
 	BUG_ON(writeback >= ARRAY_SIZE(virtblk_cache_types));
-	return snprintf(buf, 40, "%s\n", virtblk_cache_types[writeback]);
+	return sysfs_emit(buf, "%s\n", virtblk_cache_types[writeback]);
 }
 
 static DEVICE_ATTR_RW(cache_type);
-- 
2.25.1