Am Montag, 11. Januar 2010 20:37:18 schrieb Alan Stern: > More to the point, usb_autopm_put_interface() can cause the usage count > to drop to 0. If the last_busy value was too far in the past, the > device would be autosuspended immediately. That's not what we want; > the autosuspend shouldn't occur until after the appropriate delay. And > the delay should begin at the time the device is no longer being used, > which is the time when usb_autopm_put_interface() is called. But is this the time the device is used for the last time? It seems to me that the last time a device is used is the last time IO is done to it. In most cases usb_autopm_put_interface() is called in close(), which can be a long time after IO was done for the last time. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
