On Mon, 13 Sep 2010, Oliver Neukum wrote: > Am Montag, 13. September 2010, 17:17:54 schrieb Alan Stern: > > On Mon, 13 Sep 2010, Oliver Neukum wrote: > > > > > PM in this driver looks broken. Please try this. > > > > > > In short you want to drop the PM reference and depend on remote > > > wakeup and busy marking for this driver. Currently it gets a reference > > > on every open() but never drops it. > > > > > > For locking you depend on the PM core's internal lock. You simply > > > make sure you have a PM reference during open() and close() > > > > Is there any point in resuming the device during close() just in order > > to kill the interrupt URB? It seems counterproductive -- if the device > > had been suspended then there wouldn't be any interrupt URB to kill in > > the first place. > > Suppose the device does not support remote wakeup. It would never > be autosuspended while it is open, but simply resetting the flag > would never reach the PM layer. Whoops, that's right. I didn't see the assignment to needs_remote_wakeup. How come wacom_open doesn't check to see if wacom->open is already set? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
