[PATCH v1 10/10] devfreq: Allow setting governor when device governor is NULL

[Jie Zhan]

From: Zhi Wang <wangzhi12 at huawei.com>

When a device's governor is set to NULL, the system should allow
reconfiguring the governor to restore normal operation of devfreq

Before:
$: echo simple_ondemand > governor
$: rmmod -f governor_simpleondemand
$: echo performance > governor
-bash: echo: write error: Invalid argument

After:
$: echo simple_ondemand > governor
$: rmmod -f governor_simpleondemand
$: echo performance > governor
$: cat governor
performance

Signed-off-by: Zhi Wang <wangzhi12 at huawei.com>
Signed-off-by: Jie Zhan <zhanjie9 at hisilicon.com>
---
 drivers/devfreq/devfreq.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 5aebb32e89b0..a61880ff2792 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -1435,9 +1435,6 @@ static ssize_t governor_store(struct device *dev, struct device_attribute *attr,
 	char str_governor[DEVFREQ_NAME_LEN + 1];
 	const struct devfreq_governor *governor;
 
-	if (!df->governor)
-		return -EINVAL;
-
 	ret = sscanf(buf, "%" __stringify(DEVFREQ_NAME_LEN) "s", str_governor);
 	if (ret != 1)
 		return -EINVAL;
-- 
2.43.0