netdev - [PATCH net-next 2/4] net: dsa: bcm_sf2: Use correct I/O accessors

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Date:   Tue, 29 Aug 2017 11:39:43 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, opendmb@...il.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com,
        Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH net-next 2/4] net: dsa: bcm_sf2: Use correct I/O accessors

The Starfigther 2 driver currently uses __raw_{read,write}l which means
native I/O endian. This works correctly for an ARM LE kernel (default)
but fails miserably on an ARM BE (BE8) kernel where registers are kept
little endian, so replace uses with {read,write}l_relaxed here which is
what we want because this is all performance sensitive code.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/dsa/bcm_sf2.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.h b/drivers/net/dsa/bcm_sf2.h
index 7d3030e04f11..d9c96b281fc0 100644
--- a/drivers/net/dsa/bcm_sf2.h
+++ b/drivers/net/dsa/bcm_sf2.h
@@ -130,12 +130,12 @@ static inline u32 bcm_sf2_mangle_addr(struct bcm_sf2_priv *priv, u32 off)
 #define SF2_IO_MACRO(name) \
 static inline u32 name##_readl(struct bcm_sf2_priv *priv, u32 off)	\
 {									\
-	return __raw_readl(priv->name + off);				\
+	return readl_relaxed(priv->name + off);				\
 }									\
 static inline void name##_writel(struct bcm_sf2_priv *priv,		\
 				  u32 val, u32 off)			\
 {									\
-	__raw_writel(val, priv->name + off);				\
+	writel_relaxed(val, priv->name + off);				\
 }									\
 
 /* Accesses to 64-bits register requires us to latch the hi/lo pairs
@@ -179,23 +179,23 @@ static inline u32 bcm_sf2_mangle_addr(struct bcm_sf2_priv *priv, u32 off)
 static inline u32 core_readl(struct bcm_sf2_priv *priv, u32 off)
 {
 	u32 tmp = bcm_sf2_mangle_addr(priv, off);
-	return __raw_readl(priv->core + tmp);
+	return readl_relaxed(priv->core + tmp);
 }
 
 static inline void core_writel(struct bcm_sf2_priv *priv, u32 val, u32 off)
 {
 	u32 tmp = bcm_sf2_mangle_addr(priv, off);
-	__raw_writel(val, priv->core + tmp);
+	writel_relaxed(val, priv->core + tmp);
 }
 
 static inline u32 reg_readl(struct bcm_sf2_priv *priv, u16 off)
 {
-	return __raw_readl(priv->reg + priv->reg_offsets[off]);
+	return readl_relaxed(priv->reg + priv->reg_offsets[off]);
 }
 
 static inline void reg_writel(struct bcm_sf2_priv *priv, u32 val, u16 off)
 {
-	__raw_writel(val, priv->reg + priv->reg_offsets[off]);
+	writel_relaxed(val, priv->reg + priv->reg_offsets[off]);
 }
 
 SF2_IO64_MACRO(core);
-- 
1.9.1