sfc: lock TX queues when calling netif_device_detach()

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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
index f6651d35d615..2069f51b2aa9 100644
--- a/drivers/net/ethernet/sfc/selftest.c
+++ b/drivers/net/ethernet/sfc/selftest.c
@@ -722,7 +722,7 @@ int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
         /* 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);
 
         if (efx->type->test_chip) {
                 rc_reset = efx->type->test_chip(efx, tests);