From: Gottfried Haider Date: Tue, 26 Sep 2017 11:59:51 +0000 (+0000) Subject: pwm: Set class for exported channels in sysfs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7e5d1fd75c3d;p=linux.git 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 CC: Thierry Reding CC: H Hartley Sweeten 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 --- diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c index a813239300c3d..83f2b0b15712b 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);