virtio-blk: fixup coccinelle warnings

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 <[email protected]> Signed-off-by: Ye Guojin <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Michael S. Tsirkin <[email protected]> Reviewed-by: Stefan Hajnoczi <[email protected]> Reviewed-by: Stefano Garzarella <[email protected]>
sm00th · Nov 1, 2021 · f1aa12f · f1aa12f
1 parent ef5c366
commit f1aa12f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
@@ -704,7 +704,7 @@ 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);