Messages in this thread |  | | Subject | Re: [RESEND PATCH] PM / devfreq: Fix static checker warning in try_then_request_governor | From | Chanwoo Choi <> | Date | Tue, 28 May 2019 10:15:59 +0900 |
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Cc: stable@vger.kernel.org
Dear all,
It missed to send this patch to 'stable@vger.kernel.org'. So, I add it to mailing list.
Regards, Chanwoo Choi
On 19. 3. 13. 오후 9:22, 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> > Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> > --- > Hi, > > This is a resend of [1] as seems that got lost at some point and I just > noticed that was never merged. > > Thanks, > Enric > > [1] https://lkml.org/lkml/2018/10/16/744 > > > 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 0ae3de76833b..839621b044f4 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -228,7 +228,7 @@ 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) > { > @@ -254,7 +254,7 @@ 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); > } >
-- Best Regards, Chanwoo Choi Samsung Electronics
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