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 b3d02759c226bbde64ea3bdcdd3314ca646b743b..b00358297424604634489a9b106bf313c06b7fc9 100644 (file)
--- a/drivers/net/can/usb/ems_usb.c
+++ b/drivers/net/can/usb/ems_usb.c
@@ -288,6 +288,8 @@ static void ems_usb_read_interrupt_callback(struct urb *urb)
 
        case -ECONNRESET: /* unlink */
        case -ENOENT:
+       case -EPIPE:
+       case -EPROTO:
        case -ESHUTDOWN:
                return;