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r8169: fix crash if CONFIG_DEBUG_SHIRQ is enabled

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If CONFIG_DEBUG_SHIRQ is enabled __free_irq() intentionally fires
a spurious interrupt. This interrupt causes a crash because
tp->dev->phydev is NULL at that time.

Fixes: 38caff5a44 ("r8169: handle all interrupt events in the hard irq handler")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2018-12-09 22:05:11 +01:00 committed by David S. Miller
parent 2f1a9f6667
commit ee28b30cbb
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/realtek/r8169.c
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@ -6469,7 +6469,7 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
goto out;
}
if (status & LinkChg)
if (status & LinkChg && tp->dev->phydev)
phy_mac_interrupt(tp->dev->phydev);
if (unlikely(status & RxFIFOOver &&