| Message ID | 20200707102823.v5.1.I51f5a0be89595b73c4dc17e6cf4cc6f26dc7f2fc@changeid (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | power: Emit change uevent when updating sysfs | expand |
On Tue, Jul 07, 2020 at 10:28:44AM -0700, Abhishek Pandit-Subedi wrote: > Udev rules that depend on the power/wakeup attribute don't get triggered > correctly if device_set_wakeup_capable is called after the device is > created. This can happen for several reasons (driver sets wakeup after > device is created, wakeup is changed on parent device, etc) and it seems > reasonable to emit a changed event when adding or removing attributes on > the device. > > Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On Tue, Jul 07, 2020 at 10:28:44AM -0700, Abhishek Pandit-Subedi wrote: > Udev rules that depend on the power/wakeup attribute don't get triggered > correctly if device_set_wakeup_capable is called after the device is > created. This can happen for several reasons (driver sets wakeup after > device is created, wakeup is changed on parent device, etc) and it seems > reasonable to emit a changed event when adding or removing attributes on > the device. > > Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> Rafael, any objection to this? Do you want me to take it through my tree, or are you going to take it through yours? Either is fine for me. thanks, greg k-h
On Thu, Jul 23, 2020 at 8:32 PM Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote: > > On Tue, Jul 07, 2020 at 10:28:44AM -0700, Abhishek Pandit-Subedi wrote: > > Udev rules that depend on the power/wakeup attribute don't get triggered > > correctly if device_set_wakeup_capable is called after the device is > > created. This can happen for several reasons (driver sets wakeup after > > device is created, wakeup is changed on parent device, etc) and it seems > > reasonable to emit a changed event when adding or removing attributes on > > the device. > > > > Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> > > Rafael, any objection to this? Do you want me to take it through my > tree, or are you going to take it through yours? Either is fine for me. It's already there in my tree with the R-by tag from you. Cheers!
On Mon, Jul 27, 2020 at 03:38:02PM +0200, Rafael J. Wysocki wrote: > On Thu, Jul 23, 2020 at 8:32 PM Greg Kroah-Hartman > <gregkh@linuxfoundation.org> wrote: > > > > On Tue, Jul 07, 2020 at 10:28:44AM -0700, Abhishek Pandit-Subedi wrote: > > > Udev rules that depend on the power/wakeup attribute don't get triggered > > > correctly if device_set_wakeup_capable is called after the device is > > > created. This can happen for several reasons (driver sets wakeup after > > > device is created, wakeup is changed on parent device, etc) and it seems > > > reasonable to emit a changed event when adding or removing attributes on > > > the device. > > > > > > Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> > > > > Rafael, any objection to this? Do you want me to take it through my > > tree, or are you going to take it through yours? Either is fine for me. > > It's already there in my tree with the R-by tag from you. {sigh} Sorry for the noise. greg k-h
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 24d25cf8ab1487..c7b24812523c9e 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* sysfs entries for device PM */ #include <linux/device.h> +#include <linux/kobject.h> #include <linux/string.h> #include <linux/export.h> #include <linux/pm_qos.h> @@ -739,12 +740,18 @@ int dpm_sysfs_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid) int wakeup_sysfs_add(struct device *dev) { - return sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); + int ret = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); + + if (!ret) + kobject_uevent(&dev->kobj, KOBJ_CHANGE); + + return ret; } void wakeup_sysfs_remove(struct device *dev) { sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); + kobject_uevent(&dev->kobj, KOBJ_CHANGE); } int pm_qos_sysfs_add_resume_latency(struct device *dev)
Udev rules that depend on the power/wakeup attribute don't get triggered correctly if device_set_wakeup_capable is called after the device is created. This can happen for several reasons (driver sets wakeup after device is created, wakeup is changed on parent device, etc) and it seems reasonable to emit a changed event when adding or removing attributes on the device. Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> --- Changes in v5: - Ignore return from kobject_uevent when adding to sysfs Changes in v4: - Fix warning where returning from void and tested on device Changes in v3: - Simplified error handling Changes in v2: - Add newline at end of bt_dev_err drivers/base/power/sysfs.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)