| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 008/105] can: usb_8dev: cancel urb on -EPIPE and -EPROTO | Date | Fri, 15 Dec 2017 10:44:06 +0100 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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From: Martin Kelly <mkelly@xevo.com>
commit 12147edc434c9e4c7c2f5fee2e5519b2e5ac34ce 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>
--- drivers/net/can/usb/usb_8dev.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -524,6 +524,8 @@ static void usb_8dev_read_bulk_callback( break; case -ENOENT: + case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return;
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