lkml.org 
[lkml]   [2018]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] PM / devfreq: Fix static checker warning in try_then_request_governor
Hi Enric,

On 2018년 10월 16일 19:02, Enric Balletbo i Serra wrote:
> The patch 23c7b54ca1cd: "PM / devfreq: Fix devfreq_add_device() when
> drivers are built as modules." leads to the following static checker
> warning:
>
> drivers/devfreq/devfreq.c:1043 governor_store()
> warn: 'governor' can also be NULL
>
> The reason is that the try_then_request_governor() function returns both
> error pointers and NULL. It should just return error pointers, so fix
> this by returning a ERR_PTR to the error intead of returning NULL.
>
> Fixes: 23c7b54ca1cd ("PM / devfreq: Fix devfreq_add_device() when drivers are built as modules.")
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
> ---
>
> drivers/devfreq/devfreq.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 62ead442a872..b10124c7308f 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -231,7 +231,7 @@ static struct devfreq_governor *find_devfreq_governor(const char *name)
> * if is not found. This can happen when both drivers (the governor driver
> * and the driver that call devfreq_add_device) are built as modules.
> * devfreq_list_lock should be held by the caller. Returns the matched
> - * governor's pointer.
> + * governor's pointer or an error pointer.
> */
> static struct devfreq_governor *try_then_request_governor(const char *name)
> {
> @@ -257,7 +257,7 @@ static struct devfreq_governor *try_then_request_governor(const char *name)
> /* Restore previous state before return */
> mutex_lock(&devfreq_list_lock);
> if (err)
> - return NULL;
> + return ERR_PTR(err);
>
> governor = find_devfreq_governor(name);
> }
>

LGTM.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

--
Best Regards,
Chanwoo Choi
Samsung Electronics

\
 
 \ /
  Last update: 2018-10-17 02:29    [W:0.037 / U:8.988 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site