net: phy: ti: take into account all possible interrupt sources

The previous implementation of .handle_interrupt() did not take into
account the fact that all the interrupt status registers should be
acknowledged since multiple interrupt sources could be asserted.

Fix this by reading all the status registers before exiting with
IRQ_NONE or triggering the PHY state machine.

Fixes: 1d1ae3c6ca3f ("net: phy: ti: implement generic .handle_interrupt() callback")
Reported-by: Sven Schuchmann <schuchmann@schleissheimer.de>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20210226153020.867852-1-ciorneiioana@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c
index be1224b4447b40af8f608439c83930d689805ddc..f7a2ec150e542af3ff5ed1cd62a9fdae020868dd 100644 (file)
--- a/drivers/net/phy/dp83822.c
+++ b/drivers/net/phy/dp83822.c
@@ -290,6 +290,7 @@ static int dp83822_config_intr(struct phy_device *phydev)
 
 static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
 {
+       bool trigger_machine = false;
        int irq_status;
 
        /* The MISR1 and MISR2 registers are holding the interrupt status in
@@ -305,7 +306,7 @@ static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
                return IRQ_NONE;
        }
        if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
-               goto trigger_machine;
+               trigger_machine = true;
 
        irq_status = phy_read(phydev, MII_DP83822_MISR2);
        if (irq_status < 0) {
@@ -313,11 +314,11 @@ static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
                return IRQ_NONE;
        }
        if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
-               goto trigger_machine;
+               trigger_machine = true;
 
-       return IRQ_NONE;
+       if (!trigger_machine)
+               return IRQ_NONE;
 
-trigger_machine:
        phy_trigger_machine(phydev);
 
        return IRQ_HANDLED;

diff --git a/drivers/net/phy/dp83tc811.c b/drivers/net/phy/dp83tc811.c
index 688fadffb249daf35720cea2836e6f8d4f980252..7ea32fb77190c47544355d17edaffd8f9d9c7c23 100644 (file)
--- a/drivers/net/phy/dp83tc811.c
+++ b/drivers/net/phy/dp83tc811.c
@@ -264,6 +264,7 @@ static int dp83811_config_intr(struct phy_device *phydev)
 
 static irqreturn_t dp83811_handle_interrupt(struct phy_device *phydev)
 {
+       bool trigger_machine = false;
        int irq_status;
 
        /* The INT_STAT registers 1, 2 and 3 are holding the interrupt status
@@ -279,7 +280,7 @@ static irqreturn_t dp83811_handle_interrupt(struct phy_device *phydev)
                return IRQ_NONE;
        }
        if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
-               goto trigger_machine;
+               trigger_machine = true;
 
        irq_status = phy_read(phydev, MII_DP83811_INT_STAT2);
        if (irq_status < 0) {
@@ -287,7 +288,7 @@ static irqreturn_t dp83811_handle_interrupt(struct phy_device *phydev)
                return IRQ_NONE;
        }
        if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
-               goto trigger_machine;
+               trigger_machine = true;
 
        irq_status = phy_read(phydev, MII_DP83811_INT_STAT3);
        if (irq_status < 0) {
@@ -295,11 +296,11 @@ static irqreturn_t dp83811_handle_interrupt(struct phy_device *phydev)
                return IRQ_NONE;
        }
        if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
-               goto trigger_machine;
+               trigger_machine = true;
 
-       return IRQ_NONE;
+       if (!trigger_machine)
+               return IRQ_NONE;
 
-trigger_machine:
        phy_trigger_machine(phydev);
 
        return IRQ_HANDLED;