can: kvaser_usb: cancel urb on -EPIPE and -EPROTO

commit 6aa8d5945502baf4687d80de59b7ac865e9e666b upstream.

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 <mkelly@xevo.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c
index e719b907745e056d15aa3f13fe949382ffaea275..c9d61a6dfb7a368c74c564919c3b66a9c0e71abc 100644 (file)
--- 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: