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authorHeiner Kallweit <hkallweit1@gmail.com>2019-02-12 19:56:15 +0100
committerDavid S. Miller <davem@davemloft.net>2019-02-13 20:44:12 -0800
commitb79555d5d8d32643e9d7193341dcaff13bf9ffcd (patch)
treeeba13e945a7e44d0cc6dc4dcacac39e306e2d22e
parentaf98c5a78517c04adb5fd68bb64b1ad6fe3d473f (diff)
downloadlinux-stericsson-b79555d5d8d32643e9d7193341dcaff13bf9ffcd.tar.gz
net: phy: fix interrupt handling in non-started states
phylib enables interrupts before phy_start() has been called, and if we receive an interrupt in a non-started state, the interrupt handler returns IRQ_NONE. This causes problems with at least one Marvell chip as reported by Andrew. Fix this by handling interrupts the same as in phy_mac_interrupt(), basically always running the phylib state machine. It knows when it has to do something and when not. This change allows to handle interrupts gracefully even if they occur in a non-started state. Fixes: 2b3e88ea6528 ("net: phy: improve phy state checking") Reported-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/phy/phy.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 189cd2048c3a..ca5e0c0f018c 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -762,9 +762,6 @@ static irqreturn_t phy_interrupt(int irq, void *phy_dat)
{
struct phy_device *phydev = phy_dat;
- if (!phy_is_started(phydev))
- return IRQ_NONE; /* It can't be ours. */
-
if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev))
return IRQ_NONE;