On 2020-05-08 20:10, Luis Chamberlain wrote: > We revert back to synchronous request_queue removal because asynchronous > removal creates a regression with expected userspace interaction with > several drivers. An example is when removing the loopback driver, one > uses ioctls from userspace to do so, but upon return and if successful, > one expects the device to be removed. Likewise if one races to add another > device the new one may not be added as it is still being removed. This was > expected behavior before and it now fails as the device is still present > and busy still. Moving to asynchronous request_queue removal could have > broken many scripts which relied on the removal to have been completed if > there was no error. Document this expectation as well so that this > doesn't regress userspace again. Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
