From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: linux-kernel@vger.kernel.org
Cc: kernel@collabora.com, Chanwoo Choi <cw00.choi@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
linux-pm@vger.kernel.org
Subject: [PATCH] PM / devfreq: Fix static checker warning in try_then_request_governor
Date: Tue, 16 Oct 2018 12:02:03 +0200 [thread overview]
Message-ID: <20181016100203.18624-1-enric.balletbo@collabora.com> (raw)
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);
}
--
2.19.1
next reply other threads:[~2018-10-16 10:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20181016100221epcas2p3da3cd977eefd0681e7d1231640b9e96e@epcas2p3.samsung.com>
2018-10-16 10:02 ` Enric Balletbo i Serra [this message]
2018-10-17 0:27 ` [PATCH] PM / devfreq: Fix static checker warning in try_then_request_governor Chanwoo Choi
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