Hi, I need to add asynchronous control support to the UVC driver. Some UVC cameras support some controls in asynchronous mode. For those controls a USB status is returned to the host, but the control will only be completed, when an Interrupt packet is sent by the device. I can see two ways to support this: (1) synchronously: the driver waits in S_CTRL until the interrupt packet arrives (2) asynchronously: the driver returns immediately and sends an event after the Interrupt packet is received. Question: which method would be preferred, if (2) - what error code should the driver use to indicate, that the result of the control isn't known yet? Or should success be returned, since a success anyway doesn't guarantee that the specified value has already taken effect. Thanks Guennadi -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
