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e1000: fix bug with shared interrupt during reset

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A nasty bug was found where an MTU change (or anything else that caused a
reset) could race with the interrupt code.  The interrupt code was entered
by a shared interrupt during the MTU change.

This change prevents the interrupt code from running while the driver is in
the middle of its reset path.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesse Brandeburg 2009-01-27 16:41:58 -08:00 • committed by David S. Miller
commit 15b2bee22a
1 changed files with 2 additions and 2 deletions
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4
drivers/net/e1000/e1000_main.c
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@ -31,7 +31,7 @@
char e1000_driver_name[] = "e1000";
static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
#define DRV_VERSION "7.3.20-k3-NAPI"
#define DRV_VERSION "7.3.21-k3-NAPI"
const char e1000_driver_version[] = DRV_VERSION;
static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
@ -3712,7 +3712,7 @@ static irqreturn_t e1000_intr(int irq, void *data)
struct e1000_hw *hw = &adapter->hw;
u32 rctl, icr = er32(ICR);
if (unlikely(!icr))
if (unlikely((!icr) || test_bit(__E1000_RESETTING, &adapter->flags)))
return IRQ_NONE; /* Not our interrupt */
/* IMS will not auto-mask if INT_ASSERTED is not set, and if it is