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[net-next,v6,03/25] net: dsa: qca8k: improve qca8k read/write/rmw bus access

Message ID 20210514210015.18142-4-ansuelsmth@gmail.com (mailing list archive)
State Accepted
Commit 504bf65931824eda83494e5b5d75686e27ace03e
Delegated to: Netdev Maintainers
Headers show
Series Multiple improvement to qca8k stability | expand

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netdev/tree_selection success Clearly marked for net-next
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netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 68 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link

Commit Message

Christian Marangi May 14, 2021, 8:59 p.m. UTC 
Put bus in local variable to improve faster access to the mdio bus.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/dsa/qca8k.c | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

Comments

Russell King (Oracle) May 14, 2021, 10:53 p.m. UTC | #1 
On Fri, May 14, 2021 at 10:59:53PM +0200, Ansuel Smith wrote:
> Put bus in local variable to improve faster access to the mdio bus.
> 
> Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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Patch

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 25fa7084e820..3c882d325fdf 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -142,17 +142,18 @@  qca8k_set_page(struct mii_bus *bus, u16 page)
 static u32
 qca8k_read(struct qca8k_priv *priv, u32 reg)
 {
+	struct mii_bus *bus = priv->bus;
 	u16 r1, r2, page;
 	u32 val;
 
 	qca8k_split_addr(reg, &r1, &r2, &page);
 
-	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 
-	qca8k_set_page(priv->bus, page);
-	val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
+	qca8k_set_page(bus, page);
+	val = qca8k_mii_read32(bus, 0x10 | r2, r1);
 
-	mutex_unlock(&priv->bus->mdio_lock);
+	mutex_unlock(&bus->mdio_lock);
 
 	return val;
 }
@@ -160,35 +161,37 @@  qca8k_read(struct qca8k_priv *priv, u32 reg)
 static void
 qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
 {
+	struct mii_bus *bus = priv->bus;
 	u16 r1, r2, page;
 
 	qca8k_split_addr(reg, &r1, &r2, &page);
 
-	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 
-	qca8k_set_page(priv->bus, page);
-	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
+	qca8k_set_page(bus, page);
+	qca8k_mii_write32(bus, 0x10 | r2, r1, val);
 
-	mutex_unlock(&priv->bus->mdio_lock);
+	mutex_unlock(&bus->mdio_lock);
 }
 
 static u32
 qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val)
 {
+	struct mii_bus *bus = priv->bus;
 	u16 r1, r2, page;
 	u32 ret;
 
 	qca8k_split_addr(reg, &r1, &r2, &page);
 
-	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 
-	qca8k_set_page(priv->bus, page);
-	ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
+	qca8k_set_page(bus, page);
+	ret = qca8k_mii_read32(bus, 0x10 | r2, r1);
 	ret &= ~mask;
 	ret |= val;
-	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret);
+	qca8k_mii_write32(bus, 0x10 | r2, r1, ret);
 
-	mutex_unlock(&priv->bus->mdio_lock);
+	mutex_unlock(&bus->mdio_lock);
 
 	return ret;
 }