Messages in this thread | | | Date | Tue, 9 Aug 2016 15:51:08 +0200 | From | Greg KH <> | Subject | Re: [PACTH v2] cdc-wdm: Clear read pipeline in case of error |
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On Mon, Aug 08, 2016 at 11:48:52AM -0400, robert.foss@collabora.com wrote: > From: Robert Foss <robert.foss@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.foss@collabora.com> > Signed-off-by: Robert Foss <robert.foss@collabora.com> > Acked-by: Oliver Neukum <oneukum@suse.com> > --- > > Changes since v1: > - Only set a new error code it there is no previous error code
This no longer applies to my tree due to a patch sent before yours for the same driver. Can you resync against my usb-testing brance on my usb.git tree on git.kernel.org and resend?
thanks,
greg k-h
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