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ath9k: Fix NULL pointer dereference on early irq
The ah struct might not have been initialized when interrupt comes so check for it. Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -513,7 +513,7 @@ irqreturn_t ath_isr(int irq, void *dev)
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* touch anything. Note this can happen early
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* on if the IRQ is shared.
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*/
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if (test_bit(ATH_OP_INVALID, &common->op_flags))
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if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
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return IRQ_NONE;
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/* shared irq, not for us */
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