net: phy: keep track of the PHY suspend state

In order to avoid double calls to phydev->drv->suspend and resume, keep
track of whether the PHY has already been suspended as a consequence of
a successful call to phy_suspend(). We will use this in our MDIO bus
suspend/resume hooks to avoid a double suspend call.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 20 insertions, 4 deletions

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 3fc91e89f5a5..bdfe51fc3a65 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -699,6 +699,7 @@ int phy_suspend(struct phy_device *phydev)
 {
         struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
+        int ret = 0;
 
         /* If the device has WOL enabled, we cannot suspend the PHY */
         phy_ethtool_get_wol(phydev, &wol);
@@ -706,18 +707,31 @@ int phy_suspend(struct phy_device *phydev)
                 return -EBUSY;
 
         if (phydrv->suspend)
-                return phydrv->suspend(phydev);
-        return 0;
+                ret = phydrv->suspend(phydev);
+
+        if (ret)
+                return ret;
+
+        phydev->suspended = true;
+
+        return ret;
 }
 EXPORT_SYMBOL(phy_suspend);
 
 int phy_resume(struct phy_device *phydev)
 {
         struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
+        int ret = 0;
 
         if (phydrv->resume)
-                return phydrv->resume(phydev);
-        return 0;
+                ret = phydrv->resume(phydev);
+
+        if (ret)
+                return ret;
+
+        phydev->suspended = false;
+
+        return ret;
 }
 EXPORT_SYMBOL(phy_resume);
 
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 1b3690b597d5..685809835b5c 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -328,6 +328,7 @@ struct phy_c45_device_ids {
  * is_c45:  Set to true if this phy uses clause 45 addressing.
  * is_internal: Set to true if this phy is internal to a MAC.
  * has_fixups: Set to true if this phy has fixups/quirks.
+ * suspended: Set to true if this phy has been suspended successfully.
  * state: state of the PHY for management purposes
  * dev_flags: Device-specific flags used by the PHY driver.
  * addr: Bus address of PHY
@@ -365,6 +366,7 @@ struct phy_device {
         bool is_c45;
         bool is_internal;
         bool has_fixups;
+        bool suspended;
 
         enum phy_state state;