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| author | Gottfried Haider <gottfried.haider@gmail.com> | 2017-09-26 14:59:51 +0300 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2017-12-05 11:24:58 +0300 |
| commit | 7e5d1fd75c3dde9fc10c4472b9368089d1b81d00 (patch) | |
| tree | c1988f3ec49717886bcf46b5f80ea0dc940c7da9 | |
| parent | 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff) | |
| download | linux-7e5d1fd75c3dde9fc10c4472b9368089d1b81d00.tar.xz | |
pwm: Set class for exported channels in sysfs
Notifications for devices without bus or class set get dropped by
dev_uevent_filter(). Adding the class to the exported child matches
what the GPIO subsystem is doing.
With this change exporting a channel triggers a udev event, which
gives userspace a chance to fixup permissions and makes it possible
for non-root users to make use of the PWM subsystem.
Signed-off-by: Gottfried Haider <gottfried.haider@gmail.com>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: H Hartley Sweeten <hsweeten@visionengravers.com>
CC: linux-pwm@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-rpi-kernel@lists.infradead.org
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| -rw-r--r-- | drivers/pwm/sysfs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c index a813239300c3..83f2b0b15712 100644 --- a/drivers/pwm/sysfs.c +++ b/drivers/pwm/sysfs.c @@ -263,6 +263,7 @@ static int pwm_export_child(struct device *parent, struct pwm_device *pwm) export->pwm = pwm; mutex_init(&export->lock); + export->child.class = parent->class; export->child.release = pwm_export_release; export->child.parent = parent; export->child.devt = MKDEV(0, 0); |