From: Chris Brandt Date: Thu, 27 Apr 2017 19:12:02 +0000 (-0700) Subject: usb: r8a66597-hcd: select a different endpoint on timeout X-Git-Tag: MMI-PSA29.97-13-9~5558^2~20 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f873d857b6c2fefb4dada952674aa01bcfb92bd;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git usb: r8a66597-hcd: select a different endpoint on timeout If multiple endpoints on a single device have pending IN URBs and one endpoint times out due to NAKs (perfectly legal), select a different endpoint URB to try. The existing code only checked to see another device address has pending URBs and ignores other IN endpoints on the current device address. This leads to endpoints never getting serviced if one endpoint is using NAK as a flow control method. Fixes: 5d3043586db4 ("usb: r8a66597-hcd: host controller driver for R8A6659") Signed-off-by: Chris Brandt Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c index 698ec8721403..7bf78be1fd32 100644 --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -1785,6 +1785,7 @@ static void r8a66597_td_timer(unsigned long _r8a66597) pipe = td->pipe; pipe_stop(r8a66597, pipe); + /* Select a different address or endpoint */ new_td = td; do { list_move_tail(&new_td->queue, @@ -1794,7 +1795,8 @@ static void r8a66597_td_timer(unsigned long _r8a66597) new_td = td; break; } - } while (td != new_td && td->address == new_td->address); + } while (td != new_td && td->address == new_td->address && + td->pipe->info.epnum == new_td->pipe->info.epnum); start_transfer(r8a66597, new_td);