nfp: disable FW on reconfiguration errors

Since we no longer need to keep the FW enabled for .ndo_close()
to work we can always stop FW after reconfiguration failure.
This seems to make most FWs more resilient to faults (at least
in error injection scenarios).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index e12353a..8f2da12 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -2127,7 +2127,11 @@ nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn,
        nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry);
 }
 
-static int __nfp_net_set_config_and_enable(struct nfp_net *nn)
+/**
+ * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
+ * @nn:      NFP Net device to reconfigure
+ */
+static int nfp_net_set_config_and_enable(struct nfp_net *nn)
 {
        u32 new_ctrl, update = 0;
        unsigned int r;
@@ -2176,6 +2180,10 @@ static int __nfp_net_set_config_and_enable(struct nfp_net *nn)
 
        nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
        err = nfp_net_reconfig(nn, update);
+       if (err) {
+               nfp_net_clear_config_and_disable(nn);
+               return err;
+       }
 
        nn->dp.ctrl = new_ctrl;
 
@@ -2191,22 +2199,7 @@ static int __nfp_net_set_config_and_enable(struct nfp_net *nn)
                udp_tunnel_get_rx_info(nn->dp.netdev);
        }
 
-       return err;
-}
-
-/**
- * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
- * @nn:      NFP Net device to reconfigure
- */
-static int nfp_net_set_config_and_enable(struct nfp_net *nn)
-{
-       int err;
-
-       err = __nfp_net_set_config_and_enable(nn);
-       if (err)
-               nfp_net_clear_config_and_disable(nn);
-
-       return err;
+       return 0;
 }
 
 /**
@@ -2447,7 +2440,7 @@ static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
                        return err;
        }
 
-       return __nfp_net_set_config_and_enable(nn);
+       return nfp_net_set_config_and_enable(nn);
 }
 
 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)