Messages in this thread Patch in this message | | | From | Qing Wang <> | Subject | [PATCH] block: return specific error when pointer is NULL | Date | Wed, 22 Dec 2021 18:24:03 -0800 |
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From: Wang Qing <wangqing@vivo.com>
loop_attr_backing_file_show() better return specific error than 0 when pointer is NULL
Signed-off-by: Wang Qing <wangqing@vivo.com> --- drivers/block/loop.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index e52a8a5..860a5b6 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -667,7 +667,7 @@ static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf) spin_unlock_irq(&lo->lo_lock); if (IS_ERR_OR_NULL(p)) - ret = PTR_ERR(p); + ret = p ? PTR_ERR(p) : -ENOENT; else { ret = strlen(p); memmove(buf, p, ret); -- 2.7.4
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