drivers: net: xgene: Protect indirect MAC access

This patch,

     - refactors mac read/write functions
     - adds lock to protect indirect mac access

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
index 2a835e0..2050c58 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -270,42 +270,32 @@ static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
        iowrite32(val, addr);
 }
 
-static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
-                                  void __iomem *cmd, void __iomem *cmd_done,
-                                  u32 wr_addr, u32 wr_data)
+void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata, u32 wr_addr, u32 wr_data)
 {
-       u32 done;
+       void __iomem *addr, *wr, *cmd, *cmd_done;
+       struct net_device *ndev = pdata->ndev;
        u8 wait = 10;
+       u32 done;
 
+       addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
+       wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
+       cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
+       cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+       spin_lock(&pdata->mac_lock);
        iowrite32(wr_addr, addr);
        iowrite32(wr_data, wr);
        iowrite32(XGENE_ENET_WR_CMD, cmd);
 
-       /* wait for write command to complete */
        while (!(done = ioread32(cmd_done)) && wait--)
                udelay(1);
 
        if (!done)
-               return false;
+               netdev_err(ndev, "mac write failed, addr: %04x data: %08x\n",
+                          wr_addr, wr_data);
 
        iowrite32(0, cmd);
-
-       return true;
-}
-
-static void xgene_enet_wr_mcx_mac(struct xgene_enet_pdata *pdata,
-                                 u32 wr_addr, u32 wr_data)
-{
-       void __iomem *addr, *wr, *cmd, *cmd_done;
-
-       addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
-       wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
-       cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
-       cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
-
-       if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
-               netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
-                          wr_addr);
+       spin_unlock(&pdata->mac_lock);
 }
 
 static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
@@ -332,42 +322,33 @@ static void xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *pdata,
        *val = ioread32(addr);
 }
 
-static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
-                                  void __iomem *cmd, void __iomem *cmd_done,
-                                  u32 rd_addr, u32 *rd_data)
+u32 xgene_enet_rd_mac(struct xgene_enet_pdata *pdata, u32 rd_addr)
 {
-       u32 done;
+       void __iomem *addr, *rd, *cmd, *cmd_done;
+       u32 done, rd_data;
        u8 wait = 10;
 
+       addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
+       rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
+       cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
+       cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+       spin_lock(&pdata->mac_lock);
        iowrite32(rd_addr, addr);
        iowrite32(XGENE_ENET_RD_CMD, cmd);
 
-       /* wait for read command to complete */
        while (!(done = ioread32(cmd_done)) && wait--)
                udelay(1);
 
        if (!done)
-               return false;
+               netdev_err(pdata->ndev, "mac read failed, addr: %04x\n",
+                          rd_addr);
 
-       *rd_data = ioread32(rd);
+       rd_data = ioread32(rd);
        iowrite32(0, cmd);
+       spin_unlock(&pdata->mac_lock);
 
-       return true;
-}
-
-static void xgene_enet_rd_mcx_mac(struct xgene_enet_pdata *pdata,
-                                 u32 rd_addr, u32 *rd_data)
-{
-       void __iomem *addr, *rd, *cmd, *cmd_done;
-
-       addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
-       rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
-       cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
-       cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
-
-       if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
-               netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
-                          rd_addr);
+       return rd_data;
 }
 
 static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
@@ -379,8 +360,8 @@ static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
                (dev_addr[1] << 8) | dev_addr[0];
        addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
 
-       xgene_enet_wr_mcx_mac(pdata, STATION_ADDR0_ADDR, addr0);
-       xgene_enet_wr_mcx_mac(pdata, STATION_ADDR1_ADDR, addr1);
+       xgene_enet_wr_mac(pdata, STATION_ADDR0_ADDR, addr0);
+       xgene_enet_wr_mac(pdata, STATION_ADDR1_ADDR, addr1);
 }
 
 static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
@@ -405,8 +386,8 @@ static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
 
 static void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
 {
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, 0);
 }
 
 static void xgene_enet_configure_clock(struct xgene_enet_pdata *pdata)
@@ -456,8 +437,8 @@ static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
 
        xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, &icm0);
        xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, &icm2);
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_2_ADDR, &mc2);
-       xgene_enet_rd_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, &intf_ctl);
+       mc2 = xgene_enet_rd_mac(pdata, MAC_CONFIG_2_ADDR);
+       intf_ctl = xgene_enet_rd_mac(pdata, INTERFACE_CONTROL_ADDR);
        xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii);
 
        switch (pdata->phy_speed) {
@@ -495,8 +476,8 @@ static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
        }
 
        mc2 |= FULL_DUPLEX2 | PAD_CRC | LENGTH_CHK;
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
-       xgene_enet_wr_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
+       xgene_enet_wr_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
        xgene_enet_wr_csr(pdata, RGMII_REG_0_ADDR, rgmii);
        xgene_enet_configure_clock(pdata);
 
@@ -506,7 +487,7 @@ static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
 
 static void xgene_enet_set_frame_size(struct xgene_enet_pdata *pdata, int size)
 {
-       xgene_enet_wr_mcx_mac(pdata, MAX_FRAME_LEN_ADDR, size);
+       xgene_enet_wr_mac(pdata, MAX_FRAME_LEN_ADDR, size);
 }
 
 static void xgene_gmac_enable_tx_pause(struct xgene_enet_pdata *pdata,
@@ -528,14 +509,14 @@ static void xgene_gmac_flowctl_tx(struct xgene_enet_pdata *pdata, bool enable)
 {
        u32 data;
 
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
+       data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
 
        if (enable)
                data |= TX_FLOW_EN;
        else
                data &= ~TX_FLOW_EN;
 
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data);
 
        pdata->mac_ops->enable_tx_pause(pdata, enable);
 }
@@ -544,14 +525,14 @@ static void xgene_gmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
 {
        u32 data;
 
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
+       data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
 
        if (enable)
                data |= RX_FLOW_EN;
        else
                data &= ~RX_FLOW_EN;
 
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data);
 }
 
 static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
@@ -565,9 +546,9 @@ static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
        xgene_gmac_set_mac_addr(pdata);
 
        /* Adjust MDC clock frequency */
-       xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &value);
+       value = xgene_enet_rd_mac(pdata, MII_MGMT_CONFIG_ADDR);
        MGMT_CLOCK_SEL_SET(&value, 7);
-       xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
+       xgene_enet_wr_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
 
        /* Enable drop if bufpool not available */
        xgene_enet_rd_csr(pdata, RSIF_CONFIG_REG_ADDR, &value);
@@ -637,32 +618,32 @@ static void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
+       data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
 }
 
 static void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
+       data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
 }
 
 static void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
+       data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
 }
 
 static void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
-       xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
+       data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
+       xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
 }
 
 bool xgene_ring_mgr_init(struct xgene_enet_pdata *p)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
index d250bfe..057f951 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
@@ -388,6 +388,9 @@ void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata);
 bool xgene_ring_mgr_init(struct xgene_enet_pdata *p);
 int xgene_enet_phy_connect(struct net_device *ndev);
 void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata);
+u32 xgene_enet_rd_mac(struct xgene_enet_pdata *pdata, u32 rd_addr);
+void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata, u32 wr_addr,
+                      u32 wr_data);
 
 extern const struct xgene_mac_ops xgene_gmac_ops;
 extern const struct xgene_port_ops xgene_gport_ops;

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 5f37ed3..9a28ac3 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -2055,6 +2055,7 @@ static int xgene_enet_probe(struct platform_device *pdev)
                goto err;
 
        xgene_enet_setup_ops(pdata);
+       spin_lock_init(&pdata->mac_lock);
 
        if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
                ndev->features |= NETIF_F_TSO | NETIF_F_RXCSUM;

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
index 0d4be24..827b33d 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -221,6 +221,7 @@ struct xgene_enet_pdata {
        struct xgene_enet_cle cle;
        struct rtnl_link_stats64 stats;
        const struct xgene_mac_ops *mac_ops;
+       spinlock_t mac_lock; /* mac lock */
        const struct xgene_port_ops *port_ops;
        struct xgene_ring_ops *ring_ops;
        const struct xgene_cle_ops *cle_ops;

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
index a8e063b..cb6350f 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
@@ -54,41 +54,6 @@ static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
        iowrite32(val, addr);
 }
 
-static bool xgene_enet_wr_indirect(struct xgene_indirect_ctl *ctl,
-                                  u32 wr_addr, u32 wr_data)
-{
-       int i;
-
-       iowrite32(wr_addr, ctl->addr);
-       iowrite32(wr_data, ctl->ctl);
-       iowrite32(XGENE_ENET_WR_CMD, ctl->cmd);
-
-       /* wait for write command to complete */
-       for (i = 0; i < 10; i++) {
-               if (ioread32(ctl->cmd_done)) {
-                       iowrite32(0, ctl->cmd);
-                       return true;
-               }
-               udelay(1);
-       }
-
-       return false;
-}
-
-static void xgene_enet_wr_mac(struct xgene_enet_pdata *p,
-                             u32 wr_addr, u32 wr_data)
-{
-       struct xgene_indirect_ctl ctl = {
-               .addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET,
-               .ctl = p->mcx_mac_addr + MAC_WRITE_REG_OFFSET,
-               .cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET,
-               .cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET
-       };
-
-       if (!xgene_enet_wr_indirect(&ctl, wr_addr, wr_data))
-               netdev_err(p->ndev, "mac write failed, addr: %04x\n", wr_addr);
-}
-
 static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset)
 {
        return ioread32(p->eth_csr_addr + offset);
@@ -104,42 +69,6 @@ static u32 xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *p, u32 offset)
        return ioread32(p->mcx_mac_csr_addr + offset);
 }
 
-static u32 xgene_enet_rd_indirect(struct xgene_indirect_ctl *ctl, u32 rd_addr)
-{
-       u32 rd_data;
-       int i;
-
-       iowrite32(rd_addr, ctl->addr);
-       iowrite32(XGENE_ENET_RD_CMD, ctl->cmd);
-
-       /* wait for read command to complete */
-       for (i = 0; i < 10; i++) {
-               if (ioread32(ctl->cmd_done)) {
-                       rd_data = ioread32(ctl->ctl);
-                       iowrite32(0, ctl->cmd);
-
-                       return rd_data;
-               }
-               udelay(1);
-       }
-
-       pr_err("%s: mac read failed, addr: %04x\n", __func__, rd_addr);
-
-       return 0;
-}
-
-static u32 xgene_enet_rd_mac(struct xgene_enet_pdata *p, u32 rd_addr)
-{
-       struct xgene_indirect_ctl ctl = {
-               .addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET,
-               .ctl = p->mcx_mac_addr + MAC_READ_REG_OFFSET,
-               .cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET,
-               .cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET
-       };
-
-       return xgene_enet_rd_indirect(&ctl, rd_addr);
-}
-
 static int xgene_enet_ecc_init(struct xgene_enet_pdata *p)
 {
        struct net_device *ndev = p->ndev;

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
index 423240c..c6a5dac 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
@@ -71,21 +71,6 @@ static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
        return true;
 }
 
-static void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata,
-                             u32 wr_addr, u32 wr_data)
-{
-       void __iomem *addr, *wr, *cmd, *cmd_done;
-
-       addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
-       wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
-       cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
-       cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
-
-       if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
-               netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
-                          wr_addr);
-}
-
 static void xgene_enet_wr_pcs(struct xgene_enet_pdata *pdata,
                              u32 wr_addr, u32 wr_data)
 {
@@ -148,21 +133,6 @@ static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
        return true;
 }
 
-static void xgene_enet_rd_mac(struct xgene_enet_pdata *pdata,
-                             u32 rd_addr, u32 *rd_data)
-{
-       void __iomem *addr, *rd, *cmd, *cmd_done;
-
-       addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
-       rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
-       cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
-       cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
-
-       if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
-               netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
-                          rd_addr);
-}
-
 static bool xgene_enet_rd_pcs(struct xgene_enet_pdata *pdata,
                              u32 rd_addr, u32 *rd_data)
 {
@@ -300,7 +270,7 @@ static void xgene_xgmac_flowctl_tx(struct xgene_enet_pdata *pdata, bool enable)
 {
        u32 data;
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
 
        if (enable)
                data |= HSTTCTLEN;
@@ -316,7 +286,7 @@ static void xgene_xgmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
 {
        u32 data;
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
 
        if (enable)
                data |= HSTRCTLEN;
@@ -332,7 +302,7 @@ static void xgene_xgmac_init(struct xgene_enet_pdata *pdata)
 
        xgene_xgmac_reset(pdata);
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
        data |= HSTPPEN;
        data &= ~HSTLENCHK;
        xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
@@ -379,7 +349,7 @@ static void xgene_xgmac_rx_enable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
        xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTRFEN);
 }
 
@@ -387,7 +357,7 @@ static void xgene_xgmac_tx_enable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
        xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTTFEN);
 }
 
@@ -395,7 +365,7 @@ static void xgene_xgmac_rx_disable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
        xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTRFEN);
 }
 
@@ -403,7 +373,7 @@ static void xgene_xgmac_tx_disable(struct xgene_enet_pdata *pdata)
 {
        u32 data;
 
-       xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+       data = xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1);
        xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTTFEN);
 }