[PATCH net-next] net: stmmac: clean up stmmac_reset()

[Russell King (Oracle)]

stmmac_reset() takes the stmmac_priv and an ioaddr. It has one call
site, which passes the priv pointer, and dereferences priv for the
ioaddr.

stmmac_reset() then checks whether priv is NULL. If it was, the caller
would have oopsed. Remove the checks for NULL, and move the dereference
for ioaddr into stmmac_reset().

Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/hwif.c        | 8 +++-----
 drivers/net/ethernet/stmicro/stmmac/hwif.h        | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 8212441f9826..ee612cadbd77 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -103,12 +103,10 @@ static int stmmac_dwxlgmac_quirks(struct stmmac_priv *priv)
 	return 0;
 }
 
-int stmmac_reset(struct stmmac_priv *priv, void __iomem *ioaddr)
+int stmmac_reset(struct stmmac_priv *priv)
 {
-	struct plat_stmmacenet_data *plat = priv ? priv->plat : NULL;
-
-	if (!priv)
-		return -EINVAL;
+	struct plat_stmmacenet_data *plat = priv->plat;
+	void __iomem *ioaddr = priv->ioaddr;
 
 	if (plat && plat->fix_soc_reset)
 		return plat->fix_soc_reset(priv, ioaddr);
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index cb8fc09caf86..d359722100fa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -698,7 +698,7 @@ extern const struct stmmac_tc_ops dwmac510_tc_ops;
 #define GMAC_VERSION		0x00000020	/* GMAC CORE Version */
 #define GMAC4_VERSION		0x00000110	/* GMAC4+ CORE Version */
 
-int stmmac_reset(struct stmmac_priv *priv, void __iomem *ioaddr);
+int stmmac_reset(struct stmmac_priv *priv);
 int stmmac_hwif_init(struct stmmac_priv *priv);
 
 #endif /* __STMMAC_HWIF_H__ */
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index eb4350193996..d202f604161e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3162,7 +3162,7 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
 	if (ret)
 		return ret;
 
-	ret = stmmac_reset(priv, priv->ioaddr);
+	ret = stmmac_reset(priv);
 	if (ret) {
 		netdev_err(priv->dev, "Failed to reset the dma\n");
 		return ret;
-- 
2.47.3