[PATCH net-next] net: phy: improve genphy_c45_read_link

[Heiner Kallweit]

Let's make genphy_c45_read_link behave the same as genphy_update_link
and set phydev->link in the function directly. This allows to simplify
the callers. In addition don't check further devices once we detect
that at least one device reports link as down.

Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
 drivers/net/phy/marvell10g.c |  2 --
 drivers/net/phy/phy-c45.c    | 14 ++++++--------
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 38cfc923a..be2cfdfd8 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -475,8 +475,6 @@ static int mv3310_read_status(struct phy_device *phydev)
        if (val < 0)
                return val;
 
-       phydev->link = val > 0 ? 1 : 0;
-
        val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
        if (val < 0)
                return val;
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 03af927fa..8a82c3c7a 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -134,7 +134,7 @@ EXPORT_SYMBOL_GPL(genphy_c45_aneg_done);
  * @mmd_mask: MMDs to read status from
  *
  * Read the link status from the specified MMDs, and if they all indicate
- * that the link is up, return positive.  If an error is encountered,
+ * that the link is up, set phydev->link to 1.  If an error is encountered,
  * a negative errno will be returned, otherwise zero.
  */
 int genphy_c45_read_link(struct phy_device *phydev, u32 mmd_mask)
@@ -142,7 +142,7 @@ int genphy_c45_read_link(struct phy_device *phydev, u32 
mmd_mask)
        int val, devad;
        bool link = true;
 
-       while (mmd_mask) {
+       while (mmd_mask && link) {
                devad = __ffs(mmd_mask);
                mmd_mask &= ~BIT(devad);
 
@@ -158,7 +158,9 @@ int genphy_c45_read_link(struct phy_device *phydev, u32 
mmd_mask)
                        link = false;
        }
 
-       return link;
+       phydev->link = link;
+
+       return 0;
 }
 EXPORT_SYMBOL_GPL(genphy_c45_read_link);
 
@@ -287,11 +289,7 @@ int gen10g_read_status(struct phy_device *phydev)
        /* Avoid reading the vendor MMDs */
        mmd_mask &= ~(BIT(MDIO_MMD_VEND1) | BIT(MDIO_MMD_VEND2));
 
-       ret = genphy_c45_read_link(phydev, mmd_mask);
-
-       phydev->link = ret > 0 ? 1 : 0;
-
-       return 0;
+       return genphy_c45_read_link(phydev, mmd_mask);
 }
 EXPORT_SYMBOL_GPL(gen10g_read_status);
 
-- 
2.20.1