linux-kernel - [PATCH] virtio-blk: fixup coccinelle warnings

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Date:   Thu, 21 Oct 2021 06:51:11 +0000
From:   cgel.zte@...il.com
To:     mst@...hat.com
Cc:     jasowang@...hat.com, pbonzini@...hat.com, stefanha@...hat.com,
        axboe@...nel.dk, virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ye Guojin <ye.guojin@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] virtio-blk: fixup coccinelle warnings

From: Ye Guojin <ye.guojin@....com.cn>

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@....com.cn>
Signed-off-by: Ye Guojin <ye.guojin@....com.cn>
---
 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