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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>
This commit is contained in:
Jesse Brandeburg 2008-09-11 19:56:14 -07:00 committed by Jeff Garzik
parent 41fb924866
commit f47cf66e9c
1 changed files with 6 additions and 1 deletions
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7
drivers/net/ixgbe/ixgbe_main.c
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@ -1245,8 +1245,13 @@ static irqreturn_t ixgbe_intr(int irq, void *data)
/* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
* therefore no explict interrupt disable is necessary */
eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
if (!eicr)
if (!eicr) {
/* shared interrupt alert!
* make sure interrupts are enabled because the read will
* have disabled interrupts due to EIAM */
ixgbe_irq_enable(adapter);
return IRQ_NONE; /* Not our interrupt */
}
if (eicr & IXGBE_EICR_LSC)
ixgbe_check_lsc(adapter);