Re: [PATCH] chardev: set variable ret to -EBUSY before checking minor range overlap
From: Greg KH
Date: Thu Apr 25 2019 - 15:49:51 EST
On Fri, Apr 05, 2019 at 09:53:06PM +0800, Chengguang Xu wrote:
> When allocating dynamic major, the minor range overlap check
> in __register_chrdev_region() will not fail, so actually
> there is no real case to passing non negative error code to
> caller. However, set variable ret to -EBUSY before chekcking
> minor range overlap will avoid false-positive warning from
> code analyzing tool(like Smatch) and also make the code more
> easy to understand.
>
> Suggested-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxx>
> ---
> fs/char_dev.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
What tree was this patch made against? I can't seem to apply it
anywhere :(
Please fix up and resend.
thanks,
greg k-h