sfc: lock TX queues when calling netif_device_detach()
[ Upstream commit c2f3b8e3a44b6fe9e36704e30157ebe1a88c08b1 ]
The assertion of netif_device_present() at the top of
efx_hard_start_xmit() may fail if we don't do this.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
[bwh: Backported to 3.4: adjust context]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
index de4c006..0686791 100644
--- a/drivers/net/ethernet/sfc/selftest.c
+++ b/drivers/net/ethernet/sfc/selftest.c
@@ -735,7 +735,7 @@
/* Detach the device so the kernel doesn't transmit during the
* loopback test and the watchdog timeout doesn't fire.
*/
- netif_device_detach(efx->net_dev);
+ efx_device_detach_sync(efx);
mutex_lock(&efx->mac_lock);
if (efx->loopback_modes) {