On Mon, 2016-08-08 at 11:48 -0400, robert.f...@collabora.com wrote: > From: Robert Foss <robert.f...@collabora.com> > > Implemented queued response handling. This queue is processed every time the > WDM_READ flag is cleared. > > In case of a read error, userspace may not actually read the data, since the > driver returns an error through wdm_poll. After this, the underlying device > may > attempt to send us more data, but the queue is not processed. While userspace > is > also blocked, because the read error is never cleared. > > After this patch, we proactively process the queue on a read error. If there > was > an outstanding response to handle, that will clear the error (or go through > the > same logic again, if another read error occurs). If there was no outstanding > response, this will bring the queue size back to 0, unblocking a future > response > from the underlying device. > > Tested-by: Robert Foss <robert.f...@collabora.com> > Signed-off-by: Robert Foss <robert.f...@collabora.com> Acked-by: Oliver Neukum <oneu...@suse.com>
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