Messages in this thread | | | Date | Tue, 7 Aug 2012 13:47:23 -0700 | Subject | Re: [PATCH v2] leds: triggers: send uevent when changing triggers | From | Colin Cross <> |
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On Tue, Aug 7, 2012 at 1:42 PM, Greg KH <gregkh@linuxfoundation.org> wrote: > On Tue, Aug 07, 2012 at 12:58:15PM -0700, Colin Cross wrote: >> Some triggers create sysfs files when they are enabled. Send a uevent >> "change" notification whenever the trigger is changed to allow userspace >> processes such as udev to modify permissions on the new files. >> >> A change notification will also be sent during registration of led class >> devices or led triggers if the default trigger of an led class device >> is found. > > Why would a change event be needed at this point in time? Nothing would > have changed from the original "add" notification, right?
If the led class device has a default trigger configured, device_create will called before the trigger has been set and the trigger sysfs files have been created. The "change" notification will happen after the extra files have been created.
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