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PM / devfreq: Check NULL governor in available_governors_show

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commit d68adc8f85cd757bd33c8d7b2660ad6f16f7f3dc upstream.

The governor is initialized after sysfs attributes become visible so in
theory the governor field can be NULL here.

Fixes: bcf23c79c4e46 ("PM / devfreq: Fix available_governor sysfs")
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leonard Crestez 2019-09-24 10:26:53 +03:00 committed by Greg Kroah-Hartman
parent d9c64efbe0
commit 05c3fa01b5
1 changed files with 1 additions and 1 deletions
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2
drivers/devfreq/devfreq.c
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@ -974,7 +974,7 @@ static ssize_t available_governors_show(struct device *d,
* The devfreq with immutable governor (e.g., passive) shows
* only own governor.
*/
if (df->governor->immutable) {
if (df->governor && df->governor->immutable) {
count = scnprintf(&buf[count], DEVFREQ_NAME_LEN,
"%s ", df->governor_name);
/*