Hi, On Fri, Dec 05, 2014 at 09:47:30AM -0800, Greg KH wrote: > On Fri, Dec 05, 2014 at 10:34:06AM -0600, Felipe Balbi wrote: > > From: Mathias Nyman <[email protected]> > > > > commit 8e71a322fdb127814bcba423a512914ca5bc6cf5 upstream. > > > > If a device is halted and reuturns a STALL, then the halted endpoint > > needs to be cleared both on the host and device side. The host > > side halt is cleared by issueing a xhci reset endpoint command. The device > > side > > is cleared with a ClearFeature(ENDPOINT_HALT) request, which should > > be issued by the device driver if a URB reruen -EPIPE. > > > > Previously we cleared the host side halt after the device side was cleared. > > To make sure the host side halt is cleared in time we want to issue the > > reset endpoint command immedialtely when a STALL status is encountered. > > > > Otherwise we end up not following the specs and not returning -EPIPE > > several times in a row when trying to transfer data to a halted endpoint. > > > > Fixes: bcef3fd (USB: xhci: Handle errors that cause endpoint halts.) > > Tested-by: Felipe Balbi <[email protected]> > > Signed-off-by: Mathias Nyman <[email protected]> > > Signed-off-by: Greg Kroah-Hartman <[email protected]> > > Signed-off-by: Felipe Balbi <[email protected]> > > --- > > > > Mathias, can you confirm this backport is correct ? Thank you > > Backport for what kernel release?
should've mentioned: 3.14 -- balbi
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