sfc: Remove fallback for invalid permanent MAC address

By the time we look at the MAC address in efx_probe_port(), either the
driver or the firmware has already validated the board configuration.
The possibility of having an invalid MAC address just isn't worth
considering.  It certainly isn't worth having a compile-time option
for this.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 2 insertions, 30 deletions

diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index d7301d2e81a7..eff5d300aa0a 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -122,15 +122,6 @@ static int napi_weight = 64;
  */
 static unsigned int efx_monitor_interval = 1 * HZ;
 
-/* This controls whether or not the driver will initialise devices
- * with invalid MAC addresses stored in the EEPROM or flash.  If true,
- * such devices will be initialised with a random locally-generated
- * MAC address.  This allows for loading the sfc_mtd driver to
- * reprogram the flash, even if the flash contents (including the MAC
- * address) have previously been erased.
- */
-static unsigned int allow_bad_hwaddr;
-
 /* Initial interrupt moderation settings.  They can be modified after
  * module load with ethtool.
  *
@@ -916,7 +907,6 @@ static void efx_mac_work(struct work_struct *data)
 
 static int efx_probe_port(struct efx_nic *efx)
 {
-        unsigned char *perm_addr;
         int rc;
 
         netif_dbg(efx, probe, efx->net_dev, "create port\n");
@@ -929,28 +919,10 @@ static int efx_probe_port(struct efx_nic *efx)
         if (rc)
                 return rc;
 
-        /* Sanity check MAC address */
-        perm_addr = efx->net_dev->perm_addr;
-        if (is_valid_ether_addr(perm_addr)) {
-                memcpy(efx->net_dev->dev_addr, perm_addr, ETH_ALEN);
-        } else {
-                netif_err(efx, probe, efx->net_dev, "invalid MAC address %pM\n",
-                          perm_addr);
-                if (!allow_bad_hwaddr) {
-                        rc = -EINVAL;
-                        goto err;
-                }
-                random_ether_addr(efx->net_dev->dev_addr);
-                netif_info(efx, probe, efx->net_dev,
-                           "using locally-generated MAC %pM\n",
-                           efx->net_dev->dev_addr);
-        }
+        /* Initialise MAC address to permanent address */
+        memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN);
 
         return 0;
-
- err:
-        efx->type->remove_port(efx);
-        return rc;
 }
 
 static int efx_init_port(struct efx_nic *efx)