1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 864095ea5b37..d41a6e34da7d 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -1296,6 +1296,9 @@ static int efx_net_open(struct net_device *net_dev)
         EFX_LOG(efx, "opening device %s on CPU %d\n", net_dev->name,
                 raw_smp_processor_id());
 
+        if (efx->phy_mode & PHY_MODE_SPECIAL)
+                return -EBUSY;
+
         efx_start_all(efx);
         return 0;
 }