diff mbox series

[3/6] can: esd_usb2: cancel urb on -EPIPE and -EPROTO

Message ID 20171208155817.9364-4-mkl@pengutronix.de
State Accepted, archived
Delegated to: David Miller
Headers show
Series [1/6] can: mcba_usb: cancel urb on -EPROTO | expand

Commit Message

Marc Kleine-Budde Dec. 8, 2017, 3:58 p.m. UTC 
From: Martin Kelly <mkelly@xevo.com>

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>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/usb/esd_usb2.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c
index 9fdb0f0bfa06..c6dcf93675c0 100644
--- a/drivers/net/can/usb/esd_usb2.c
+++ b/drivers/net/can/usb/esd_usb2.c
@@ -393,6 +393,8 @@  static void esd_usb2_read_bulk_callback(struct urb *urb)
 		break;
 
 	case -ENOENT:
+	case -EPIPE:
+	case -EPROTO:
 	case -ESHUTDOWN:
 		return;