Commit f3b8edc0 authored by Aaro Koskinen's avatar Aaro Koskinen Committed by Greg Kroah-Hartman

staging: octeon-usb: fail and warn if DMA counters are wrong

Fail and WARN if DMA counters are wrong.
Signed-off-by: default avatarAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent eb04114f
...@@ -2617,6 +2617,17 @@ static int cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel) ...@@ -2617,6 +2617,17 @@ static int cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel)
(pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)) (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT))
pipe->flags |= CVMX_USB_PIPE_FLAGS_NEED_PING; pipe->flags |= CVMX_USB_PIPE_FLAGS_NEED_PING;
if (unlikely(WARN_ON_ONCE(bytes_this_transfer < 0))) {
/*
* In some rare cases the DMA engine seems to get stuck and
* keeps substracting same byte count over and over again. In
* such case we just need to fail every transaction.
*/
cvmx_usb_perform_complete(usb, pipe, transaction,
CVMX_USB_COMPLETE_ERROR);
return 0;
}
if (usbc_hcint.s.stall) { if (usbc_hcint.s.stall) {
/* /*
* STALL as a response means this transaction cannot be * STALL as a response means this transaction cannot be
......
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