net: dsa: lan9303: refactor lan9303_get_ethtool_stats

In lan9303_get_ethtool_stats: Get rid of 0x400 constant magic
by using new lan9303_read_switch_reg() inside loop.
Reduced scope of two variables.

Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 444958b..15befd1 100644 (file)
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -435,6 +435,13 @@ static int lan9303_write_switch_port(struct lan9303 *chip, int port,
                chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
 }
 
+static int lan9303_read_switch_port(struct lan9303 *chip, int port,
+                                   u16 regnum, u32 *val)
+{
+       return lan9303_read_switch_reg(
+               chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
+}
+
 static int lan9303_detect_phy_setup(struct lan9303 *chip)
 {
        int reg;
@@ -705,19 +712,18 @@ static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port,
                                      uint64_t *data)
 {
        struct lan9303 *chip = ds->priv;
-       u32 reg;
-       unsigned int u, poff;
-       int ret;
-
-       poff = port * 0x400;
+       unsigned int u;
 
        for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
-               ret = lan9303_read_switch_reg(chip,
-                                             lan9303_mib[u].offset + poff,
-                                             &reg);
+               u32 reg;
+               int ret;
+
+               ret = lan9303_read_switch_port(
+                       chip, port, lan9303_mib[u].offset, &reg);
+
                if (ret)
-                       dev_warn(chip->dev, "Reading status reg %u failed\n",
-                                lan9303_mib[u].offset + poff);
+                       dev_warn(chip->dev, "Reading status port %d reg %u failed\n",
+                                port, lan9303_mib[u].offset);
                data[u] = reg;
        }
 }