stmmac: allow mmc usage only if feature actually available (V4)

Enable the MMC support if it is actually available from the
HW capability register.

Signed-off-by: Rayagond Kokatanur <rayagond@vayavyalabs.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index aedff9a90ebc2fa5814224d9d1c57f2405564035..406404f6e32193d5d7d1f5b06433a9bcb4d38ea0 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -96,7 +96,7 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
        { #m, FIELD_SIZEOF(struct stmmac_counters, m),  \
        offsetof(struct stmmac_priv, mmc.m)}
 
-static const struct stmmac_stats stmmac_gstr_mmc[] = {
+static const struct stmmac_stats stmmac_mmc[] = {
        STMMAC_MMC_STAT(mmc_tx_octetcount_gb),
        STMMAC_MMC_STAT(mmc_tx_framecount_gb),
        STMMAC_MMC_STAT(mmc_tx_broadcastframe_g),
@@ -177,7 +177,7 @@ static const struct stmmac_stats stmmac_gstr_mmc[] = {
        STMMAC_MMC_STAT(mmc_rx_icmp_gd_octets),
        STMMAC_MMC_STAT(mmc_rx_icmp_err_octets),
 };
-#define STMMAC_MMC_STATS_LEN ARRAY_SIZE(stmmac_gstr_mmc)
+#define STMMAC_MMC_STATS_LEN ARRAY_SIZE(stmmac_mmc)
 
 static void stmmac_ethtool_getdrvinfo(struct net_device *dev,
                                      struct ethtool_drvinfo *info)
@@ -348,13 +348,17 @@ static void stmmac_get_ethtool_stats(struct net_device *dev,
                                                 priv->ioaddr);
        else {
                /* If supported, for new GMAC chips expose the MMC counters */
-               dwmac_mmc_read(priv->ioaddr, &priv->mmc);
+               if (priv->dma_cap.rmon) {
+                       dwmac_mmc_read(priv->ioaddr, &priv->mmc);
 
-               for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) {
-                       char *p = (char *)priv + stmmac_gstr_mmc[i].stat_offset;
+                       for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) {
+                               char *p;
+                               p = (char *)priv + stmmac_mmc[i].stat_offset;
 
-                       data[j++] = (stmmac_gstr_mmc[i].sizeof_stat ==
-                                    sizeof(u64)) ? (*(u64 *)p) : (*(u32 *)p);
+                               data[j++] = (stmmac_mmc[i].sizeof_stat ==
+                                            sizeof(u64)) ? (*(u64 *)p) :
+                                            (*(u32 *)p);
+                       }
                }
        }
        for (i = 0; i < STMMAC_STATS_LEN; i++) {
@@ -373,7 +377,7 @@ static int stmmac_get_sset_count(struct net_device *netdev, int sset)
        case ETH_SS_STATS:
                len = STMMAC_STATS_LEN;
 
-               if (priv->plat->has_gmac)
+               if (priv->dma_cap.rmon)
                        len += STMMAC_MMC_STATS_LEN;
 
                return len;
@@ -390,9 +394,9 @@ static void stmmac_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 
        switch (stringset) {
        case ETH_SS_STATS:
-               if (priv->plat->has_gmac)
+               if (priv->dma_cap.rmon)
                        for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) {
-                               memcpy(p, stmmac_gstr_mmc[i].stat_string,
+                               memcpy(p, stmmac_mmc[i].stat_string,
                                       ETH_GSTRING_LEN);
                                p += ETH_GSTRING_LEN;
                        }

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c88dc358f9b0692ed20bb0bd1f77b74a575bb5e7..bf895cb75785a01a595ff0ef5805d74ea5f320e2 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -946,7 +946,8 @@ static int stmmac_open(struct net_device *dev)
        memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
        priv->xstats.threshold = tc;
 
-       stmmac_mmc_setup(priv);
+       if (priv->dma_cap.rmon)
+               stmmac_mmc_setup(priv);
 
        /* Start the ball rolling... */
        DBG(probe, DEBUG, "%s: DMA RX/TX processes started...\n", dev->name);