| From | Ben Hutchings <> | Date | Wed, 28 Feb 2018 15:20:18 +0000 | Subject | [PATCH 3.16 069/254] can: kvaser_usb: cancel urb on -EPIPE and -EPROTO |
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3.16.55-rc1 review patch. If anyone has any objections, please let me know.
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From: Martin Kelly <mkelly@xevo.com>
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: Ben Hutchings <ben@decadent.org.uk> --- drivers/net/can/usb/kvaser_usb.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/can/usb/kvaser_usb.c +++ b/drivers/net/can/usb/kvaser_usb.c @@ -975,6 +975,8 @@ static void kvaser_usb_read_bulk_callbac case 0: break; case -ENOENT: + case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return; default:
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