Am Mittwoch, 12. Oktober 2011, 18:16:51 schrieb Matthew Garrett: > On Wed, Oct 12, 2011 at 11:28:06AM -0400, Alan Stern wrote: > > > Well, if the usage counter is 0 then you wouldn't want to call > > usb_put_interface_async(). On the other hand, if the usage counter is > > 0 then by definition the device isn't in use, so you shouldn't need to > > fail an autosuspend request -- not unless it races with an I/O event. > > Yeah. Plausibly the model we have in hid is wrong at the moment - rather > than set flags that block suspend, it might make more sense to take > references. It'd complicate things a little, in that we'd have to take > more care in terms of keeping track of the state. I am afraid references are very hard to take there because it needs to be done in interrupt. Regards Oliver -- 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
