netdev - [PATCH] net: phy: marvell: optimize logic for page changing during init

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Date:   Thu, 10 Nov 2016 15:03:01 +0100
From:   Uwe Kleine-König <uwe@...ine-koenig.org>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org
Subject: [PATCH] net: phy: marvell: optimize logic for page changing during init

Instead of remembering if the page was changed, just compare the current
page to the saved one. This is easier and has the advantage to save a
register write if the page was already restored.

Signed-off-by: Uwe Kleine-König <uwe@...ine-koenig.org>
---
 drivers/net/phy/marvell.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index c2dcf02df202..fa31f50824d3 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -361,7 +361,7 @@ static int m88e1111_config_aneg(struct phy_device *phydev)
 static int marvell_of_reg_init(struct phy_device *phydev)
 {
 	const __be32 *paddr;
-	int len, i, saved_page, current_page, page_changed, ret;
+	int len, i, saved_page, current_page, ret;
 
 	if (!phydev->mdio.dev.of_node)
 		return 0;
@@ -374,7 +374,6 @@ static int marvell_of_reg_init(struct phy_device *phydev)
 	saved_page = phy_read(phydev, MII_MARVELL_PHY_PAGE);
 	if (saved_page < 0)
 		return saved_page;
-	page_changed = 0;
 	current_page = saved_page;
 
 	ret = 0;
@@ -388,7 +387,6 @@ static int marvell_of_reg_init(struct phy_device *phydev)
 
 		if (reg_page != current_page) {
 			current_page = reg_page;
-			page_changed = 1;
 			ret = phy_write(phydev, MII_MARVELL_PHY_PAGE, reg_page);
 			if (ret < 0)
 				goto err;
@@ -411,7 +409,7 @@ static int marvell_of_reg_init(struct phy_device *phydev)
 
 	}
 err:
-	if (page_changed) {
+	if (current_page != saved_page) {
 		i = phy_write(phydev, MII_MARVELL_PHY_PAGE, saved_page);
 		if (ret == 0)
 			ret = i;
-- 
2.10.2