stmmac: ipq806x: Return error values instead of pointers

Typically we return error pointers when we want to use those
pointers in the non-error case, but this function is just
returning error pointers or NULL for success. Change the style to
plain int to follow normal kernel coding styles.

Cc: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
index 82de68b..36d3355 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
@@ -198,19 +198,19 @@ static int ipq806x_gmac_set_speed(struct ipq806x_gmac *gmac, unsigned int speed)
        return 0;
 }
 
-static void *ipq806x_gmac_of_parse(struct ipq806x_gmac *gmac)
+static int ipq806x_gmac_of_parse(struct ipq806x_gmac *gmac)
 {
        struct device *dev = &gmac->pdev->dev;
 
        gmac->phy_mode = of_get_phy_mode(dev->of_node);
        if (gmac->phy_mode < 0) {
                dev_err(dev, "missing phy mode property\n");
-               return ERR_PTR(-EINVAL);
+               return -EINVAL;
        }
 
        if (of_property_read_u32(dev->of_node, "qcom,id", &gmac->id) < 0) {
                dev_err(dev, "missing qcom id property\n");
-               return ERR_PTR(-EINVAL);
+               return -EINVAL;
        }
 
        /* The GMACs are called 1 to 4 in the documentation, but to simplify the
@@ -219,13 +219,13 @@ static void *ipq806x_gmac_of_parse(struct ipq806x_gmac *gmac)
         */
        if (gmac->id < 0 || gmac->id > 3) {
                dev_err(dev, "invalid gmac id\n");
-               return ERR_PTR(-EINVAL);
+               return -EINVAL;
        }
 
        gmac->core_clk = devm_clk_get(dev, "stmmaceth");
        if (IS_ERR(gmac->core_clk)) {
                dev_err(dev, "missing stmmaceth clk property\n");
-               return gmac->core_clk;
+               return PTR_ERR(gmac->core_clk);
        }
        clk_set_rate(gmac->core_clk, 266000000);
 
@@ -234,18 +234,16 @@ static void *ipq806x_gmac_of_parse(struct ipq806x_gmac *gmac)
                                                           "qcom,nss-common");
        if (IS_ERR(gmac->nss_common)) {
                dev_err(dev, "missing nss-common node\n");
-               return gmac->nss_common;
+               return PTR_ERR(gmac->nss_common);
        }
 
        /* Setup the register map for the qsgmii csr registers */
        gmac->qsgmii_csr = syscon_regmap_lookup_by_phandle(dev->of_node,
                                                           "qcom,qsgmii-csr");
-       if (IS_ERR(gmac->qsgmii_csr)) {
+       if (IS_ERR(gmac->qsgmii_csr))
                dev_err(dev, "missing qsgmii-csr node\n");
-               return gmac->qsgmii_csr;
-       }
 
-       return NULL;
+       return PTR_ERR_OR_ZERO(gmac->qsgmii_csr);
 }
 
 static void ipq806x_gmac_fix_mac_speed(void *priv, unsigned int speed)
@@ -262,7 +260,7 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct ipq806x_gmac *gmac;
        int val;
-       void *err;
+       int err;
 
        val = stmmac_get_platform_resources(pdev, &stmmac_res);
        if (val)
@@ -279,9 +277,9 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
        gmac->pdev = pdev;
 
        err = ipq806x_gmac_of_parse(gmac);
-       if (IS_ERR(err)) {
+       if (err) {
                dev_err(dev, "device tree parsing error\n");
-               return PTR_ERR(err);
+               return err;
        }
 
        regmap_write(gmac->qsgmii_csr, QSGMII_PCS_CAL_LCKDT_CTL,