sfc: Do not read STAT1.FAULT in efx_mdio_check_mmd()

This field does not exist in all MMDs we want to check, and all
callers allow it to be set (fault_fatal = 0).

Remove the loopback condition, as STAT2.DEVPRST should be valid
regardless of any fault.

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

4 files changed, 8 insertions, 31 deletions

diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index 56b0266b441..6e82e5ba583 100644
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -51,13 +51,10 @@ int efx_mdio_reset_mmd(struct efx_nic *port, int mmd,
         return spins ? spins : -ETIMEDOUT;
 }
 
-static int efx_mdio_check_mmd(struct efx_nic *efx, int mmd, int fault_fatal)
+static int efx_mdio_check_mmd(struct efx_nic *efx, int mmd)
 {
         int status;
 
-        if (LOOPBACK_INTERNAL(efx))
-                return 0;
-
         if (mmd != MDIO_MMD_AN) {
                 /* Read MMD STATUS2 to check it is responding. */
                 status = efx_mdio_read(efx, mmd, MDIO_STAT2);
@@ -68,20 +65,6 @@ static int efx_mdio_check_mmd(struct efx_nic *efx, int mmd, int fault_fatal)
                 }
         }
 
-        /* Read MMD STATUS 1 to check for fault. */
-        status = efx_mdio_read(efx, mmd, MDIO_STAT1);
-        if (status & MDIO_STAT1_FAULT) {
-                if (fault_fatal) {
-                        netif_err(efx, hw, efx->net_dev,
-                                  "PHY MMD %d reporting fatal"
-                                  " fault: status %x\n", mmd, status);
-                        return -EIO;
-                } else {
-                        netif_dbg(efx, hw, efx->net_dev,
-                                  "PHY MMD %d reporting status"
-                                  " %x (expected)\n", mmd, status);
-                }
-        }
         return 0;
 }
 
@@ -130,8 +113,7 @@ int efx_mdio_wait_reset_mmds(struct efx_nic *efx, unsigned int mmd_mask)
         return rc;
 }
 
-int efx_mdio_check_mmds(struct efx_nic *efx,
-                        unsigned int mmd_mask, unsigned int fatal_mask)
+int efx_mdio_check_mmds(struct efx_nic *efx, unsigned int mmd_mask)
 {
         int mmd = 0, probe_mmd, devs1, devs2;
         u32 devices;
@@ -161,13 +143,9 @@ int efx_mdio_check_mmds(struct efx_nic *efx,
 
         /* Check all required MMDs are responding and happy. */
         while (mmd_mask) {
-                if (mmd_mask & 1) {
-                        int fault_fatal = fatal_mask & 1;
-                        if (efx_mdio_check_mmd(efx, mmd, fault_fatal))
-                                return -EIO;
-                }
+                if ((mmd_mask & 1) && efx_mdio_check_mmd(efx, mmd))
+                        return -EIO;
                 mmd_mask = mmd_mask >> 1;
-                fatal_mask = fatal_mask >> 1;
                 mmd++;
         }
 
@@ -337,7 +315,7 @@ int efx_mdio_test_alive(struct efx_nic *efx)
                           "no MDIO PHY present with ID %d\n", efx->mdio.prtad);
                 rc = -EINVAL;
         } else {
-                rc = efx_mdio_check_mmds(efx, efx->mdio.mmds, 0);
+                rc = efx_mdio_check_mmds(efx, efx->mdio.mmds);
         }
 
         mutex_unlock(&efx->mac_lock);
diff --git a/drivers/net/sfc/mdio_10g.h b/drivers/net/sfc/mdio_10g.h
index 75791d3d496..44c5dee5210 100644
--- a/drivers/net/sfc/mdio_10g.h
+++ b/drivers/net/sfc/mdio_10g.h
@@ -68,8 +68,7 @@ extern int efx_mdio_reset_mmd(struct efx_nic *efx, int mmd,
                               int spins, int spintime);
 
 /* As efx_mdio_check_mmd but for multiple MMDs */
-int efx_mdio_check_mmds(struct efx_nic *efx,
-                        unsigned int mmd_mask, unsigned int fatal_mask);
+int efx_mdio_check_mmds(struct efx_nic *efx, unsigned int mmd_mask);
 
 /* Check the link status of specified mmds in bit mask */
 extern bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask);
diff --git a/drivers/net/sfc/tenxpress.c b/drivers/net/sfc/tenxpress.c
index f102912eba9..581911f7044 100644
--- a/drivers/net/sfc/tenxpress.c
+++ b/drivers/net/sfc/tenxpress.c
@@ -196,7 +196,7 @@ static int tenxpress_phy_init(struct efx_nic *efx)
                 if (rc < 0)
                         return rc;
 
-                rc = efx_mdio_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
+                rc = efx_mdio_check_mmds(efx, TENXPRESS_REQUIRED_DEVS);
                 if (rc < 0)
                         return rc;
         }
diff --git a/drivers/net/sfc/txc43128_phy.c b/drivers/net/sfc/txc43128_phy.c
index 351794a7921..4e2b48a8f5c 100644
--- a/drivers/net/sfc/txc43128_phy.c
+++ b/drivers/net/sfc/txc43128_phy.c
@@ -193,7 +193,7 @@ static int txc_reset_phy(struct efx_nic *efx)
                 goto fail;
 
         /* Check that all the MMDs we expect are present and responding. */
-        rc = efx_mdio_check_mmds(efx, TXC_REQUIRED_DEVS, 0);
+        rc = efx_mdio_check_mmds(efx, TXC_REQUIRED_DEVS);
         if (rc < 0)
                 goto fail;