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can: ems_usb: cancel urb on -EPIPE and -EPROTO 

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>
This commit is contained in:
Martin Kelly 2017-12-05 11:15:47 -08:00 committed by Marc Kleine-Budde
parent c7f3302330
commit bd352e1adf
1 changed files with 2 additions and 0 deletions
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2
drivers/net/can/usb/ems_usb.c
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@ -288,6 +288,8 @@ static void ems_usb_read_interrupt_callback(struct urb *urb)
case -ECONNRESET: /* unlink */ case -ECONNRESET: /* unlink */
case -ENOENT: case -ENOENT:
case -EPIPE:
case -EPROTO:
case -ESHUTDOWN: case -ESHUTDOWN:
return; return;