diff options
| author | Chanwoo Choi <cw00.choi@samsung.com> | 2016-12-28 12:52:35 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-01-03 00:21:45 +0100 |
| commit | 73613b16cb5c5d5a659fc8832eff99eead3f9afb (patch) | |
| tree | 81346e17f4b5c66e0d449275feaa449619f95c55 /drivers/devfreq/devfreq.c | |
| parent | MAINTAINERS: Add myself as reviewer for DEVFREQ subsystem support (diff) | |
| download | linux-73613b16cb5c5d5a659fc8832eff99eead3f9afb.tar.xz linux-73613b16cb5c5d5a659fc8832eff99eead3f9afb.zip | |
PM / devfreq: Fix the bug of devfreq_add_device when governor is NULL
This patch fixes the bug of devfreq_add_device(). The devfreq device must
have the default governor. If find_devfreq_governor() returns error,
devfreq_add_device() fail to add the devfreq instance.
Fixes: 1b5c1be2c88e (PM / devfreq: map devfreq drivers to governor using name)
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/devfreq/devfreq.c')
| -rw-r--r-- | drivers/devfreq/devfreq.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index a324801d6a66..47206a21bb90 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -593,11 +593,16 @@ struct devfreq *devfreq_add_device(struct device *dev, list_add(&devfreq->node, &devfreq_list); governor = find_devfreq_governor(devfreq->governor_name); - if (!IS_ERR(governor)) - devfreq->governor = governor; - if (devfreq->governor) - err = devfreq->governor->event_handler(devfreq, - DEVFREQ_GOV_START, NULL); + if (IS_ERR(governor)) { + dev_err(dev, "%s: Unable to find governor for the device\n", + __func__); + err = PTR_ERR(governor); + goto err_init; + } + + devfreq->governor = governor; + err = devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_START, + NULL); if (err) { dev_err(dev, "%s: Unable to start governor for the device\n", __func__); |