From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Kleine-Budde Subject: [PATCH 4/6] can: kvaser_usb: cancel urb on -EPIPE and -EPROTO Date: Fri, 8 Dec 2017 16:58:15 +0100 Message-ID: <20171208155817.9364-5-mkl@pengutronix.de> References: <20171208155817.9364-1-mkl@pengutronix.de> Cc: davem@davemloft.net, linux-can@vger.kernel.org, kernel@pengutronix.de, Martin Kelly , linux-stable , Marc Kleine-Budde To: netdev@vger.kernel.org Return-path: In-Reply-To: <20171208155817.9364-1-mkl@pengutronix.de> Sender: netdev-owner@vger.kernel.org List-ID: From: Martin Kelly In mcba_usb, we have observed that when you unplug the device, the driver will endlessly resubmit failing URBs, which can cause CPU stalls. This issue is fixed in mcba_usb by catching the codes seen on device disconnect (-EPIPE and -EPROTO). This driver also resubmits in the case of -EPIPE and -EPROTO, so fix it in the same way. Signed-off-by: Martin Kelly Cc: linux-stable Signed-off-by: Marc Kleine-Budde --- drivers/net/can/usb/kvaser_usb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c index f95945915d20..63587b8e6825 100644 --- a/drivers/net/can/usb/kvaser_usb.c +++ b/drivers/net/can/usb/kvaser_usb.c @@ -1326,6 +1326,8 @@ static void kvaser_usb_read_bulk_callback(struct urb *urb) case 0: break; case -ENOENT: + case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return; default: -- 2.15.0