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

commit bd352e1adfe0d02d3ea7c8e3fb19183dc317e679 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/ems_usb.c b/drivers/net/can/usb/ems_usb.c
index eb7192fab5932bcde88f31f0b90604997e27a524..357c9e89fdf952afbb5299330a3b33f4a9fe7e65 100644 (file)
--- a/drivers/net/can/usb/ems_usb.c
+++ b/drivers/net/can/usb/ems_usb.c
@@ -290,6 +290,8 @@ static void ems_usb_read_interrupt_callback(struct urb *urb)
 
        case -ECONNRESET: /* unlink */
        case -ENOENT:
+       case -EPIPE:
+       case -EPROTO:
        case -ESHUTDOWN:
                return;