diff mbox series

[RFC,net-next,v5,22/25] net: dsa: qca8k: improve internal mdio read/write bus access

Message ID 20210511020500.17269-23-ansuelsmth@gmail.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Multiple improvement to qca8k stability | expand

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netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count fail Series longer than 15 patches
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
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 75 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 11, 2021, 2:04 a.m. UTC 
Improve the internal mdio read/write bus access by caching the value
without accessing it for every read/write.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
 drivers/net/dsa/qca8k.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 307fe7eb03f3..920cdb1ff2b9 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -655,6 +655,7 @@  static int
 qca8k_mdio_write(struct mii_bus *salve_bus, int phy, int regnum, u16 data)
 {
 	struct qca8k_priv *priv = salve_bus->priv;
+	struct mii_bus *bus = priv->bus;
 	u16 r1, r2, page;
 	u32 val;
 	int ret;
@@ -669,22 +670,22 @@  qca8k_mdio_write(struct mii_bus *salve_bus, int phy, int regnum, u16 data)
 
 	qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
 
-	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 
-	ret = qca8k_set_page(priv->bus, page);
+	ret = qca8k_set_page(bus, page);
 	if (ret)
 		goto exit;
 
-	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
+	qca8k_mii_write32(bus, 0x10 | r2, r1, val);
 
-	ret = qca8k_mdio_busy_wait(priv->bus, QCA8K_MDIO_MASTER_CTRL,
+	ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
 				   QCA8K_MDIO_MASTER_BUSY);
 
 exit:
 	/* even if the busy_wait timeouts try to clear the MASTER_EN */
-	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, 0);
+	qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
 
-	mutex_unlock(&priv->bus->mdio_lock);
+	mutex_unlock(&bus->mdio_lock);
 
 	return ret;
 }
@@ -693,6 +694,7 @@  static int
 qca8k_mdio_read(struct mii_bus *salve_bus, int phy, int regnum)
 {
 	struct qca8k_priv *priv = salve_bus->priv;
+	struct mii_bus *bus = priv->bus;
 	u16 r1, r2, page;
 	u32 val;
 	int ret;
@@ -706,26 +708,26 @@  qca8k_mdio_read(struct mii_bus *salve_bus, int phy, int regnum)
 
 	qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
 
-	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 
-	ret = qca8k_set_page(priv->bus, page);
+	ret = qca8k_set_page(bus, page);
 	if (ret)
 		goto exit;
 
-	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
+	qca8k_mii_write32(bus, 0x10 | r2, r1, val);
 
-	ret = qca8k_mdio_busy_wait(priv->bus, QCA8K_MDIO_MASTER_CTRL,
+	ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
 				   QCA8K_MDIO_MASTER_BUSY);
 	if (ret)
 		goto exit;
 
-	val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
+	val = qca8k_mii_read32(bus, 0x10 | r2, r1);
 
 exit:
 	/* even if the busy_wait timeouts try to clear the MASTER_EN */
-	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, 0);
+	qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
 
-	mutex_unlock(&priv->bus->mdio_lock);
+	mutex_unlock(&bus->mdio_lock);
 
 	if (val >= 0)
 		val &= QCA8K_MDIO_MASTER_DATA_MASK;