sfc: When disabling the NIC, close the device rather than unregistering it

This should reduce user confusion and may also aid recovery (ioctls
will still be available).

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 46c2a8b..5cc59e6 100644 (file)
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -1332,6 +1332,8 @@ 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->state == STATE_DISABLED)
+               return -EIO;
        if (efx->phy_mode & PHY_MODE_SPECIAL)
                return -EBUSY;
 
@@ -1350,10 +1352,12 @@ static int efx_net_stop(struct net_device *net_dev)
        EFX_LOG(efx, "closing %s on CPU %d\n", net_dev->name,
                raw_smp_processor_id());
 
-       /* Stop the device and flush all the channels */
-       efx_stop_all(efx);
-       efx_fini_channels(efx);
-       efx_init_channels(efx);
+       if (efx->state != STATE_DISABLED) {
+               /* Stop the device and flush all the channels */
+               efx_stop_all(efx);
+               efx_fini_channels(efx);
+               efx_init_channels(efx);
+       }
 
        return 0;
 }
@@ -1685,7 +1689,7 @@ static int efx_reset(struct efx_nic *efx)
 {
        struct ethtool_cmd ecmd;
        enum reset_type method = efx->reset_pending;
-       int rc;
+       int rc = 0;
 
        /* Serialise with kernel interfaces */
        rtnl_lock();
@@ -1694,7 +1698,7 @@ static int efx_reset(struct efx_nic *efx)
         * flag set so that efx_pci_probe_main will be retried */
        if (efx->state != STATE_RUNNING) {
                EFX_INFO(efx, "scheduled reset quenched. NIC not RUNNING\n");
-               goto unlock_rtnl;
+               goto out_unlock;
        }
 
        EFX_INFO(efx, "resetting (%d)\n", method);
@@ -1704,7 +1708,7 @@ static int efx_reset(struct efx_nic *efx)
        rc = falcon_reset_hw(efx, method);
        if (rc) {
                EFX_ERR(efx, "failed to reset hardware\n");
-               goto fail;
+               goto out_disable;
        }
 
        /* Allow resets to be rescheduled. */
@@ -1718,28 +1722,23 @@ static int efx_reset(struct efx_nic *efx)
 
        /* Leave device stopped if necessary */
        if (method == RESET_TYPE_DISABLE) {
+               efx_reset_up(efx, &ecmd, false);
                rc = -EIO;
-               goto fail;
+       } else {
+               rc = efx_reset_up(efx, &ecmd, true);
        }
 
-       rc = efx_reset_up(efx, &ecmd, true);
-       if (rc)
-               goto disable;
-
-       EFX_LOG(efx, "reset complete\n");
- unlock_rtnl:
-       rtnl_unlock();
-       return 0;
-
- fail:
-       efx_reset_up(efx, &ecmd, false);
- disable:
-       EFX_ERR(efx, "has been disabled\n");
-       efx->state = STATE_DISABLED;
+out_disable:
+       if (rc) {
+               EFX_ERR(efx, "has been disabled\n");
+               efx->state = STATE_DISABLED;
+               dev_close(efx->net_dev);
+       } else {
+               EFX_LOG(efx, "reset complete\n");
+       }
 
+out_unlock:
        rtnl_unlock();
-       efx_unregister_netdev(efx);
-       efx_fini_port(efx);
        return rc;
 }