[PATCH 4/6] can: kvaser_usb: cancel urb on -EPIPE and -EPROTO

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From: Martin Kelly <mkelly@xxxxxxxx>

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@xxxxxxxx>
Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
 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




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