ixgbe: fix bug with shared interrupts
fix ixgbe bug reported with shared legacy interrupts Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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@ -1245,8 +1245,13 @@ static irqreturn_t ixgbe_intr(int irq, void *data)
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/* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
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* therefore no explict interrupt disable is necessary */
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eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
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if (!eicr)
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if (!eicr) {
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/* shared interrupt alert!
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* make sure interrupts are enabled because the read will
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* have disabled interrupts due to EIAM */
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ixgbe_irq_enable(adapter);
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return IRQ_NONE; /* Not our interrupt */
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}
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if (eicr & IXGBE_EICR_LSC)
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ixgbe_check_lsc(adapter);
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