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fm10k: no need to continue in fm10k_down if __FM10K_DOWN already set

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Return early from fm10k_down() when we are already down, since that
means another thread is either already finished or has started going
down, so shouldn't conflict with them.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2016-06-03 15:42:11 -07:00 committed by Jeff Kirsher
parent c0d661ca37
commit 1b00c6c064
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/intel/fm10k/fm10k_pci.c
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@ -1601,7 +1601,8 @@ void fm10k_down(struct fm10k_intfc *interface)
int err;
/* signal that we are down to the interrupt handler and service task */
set_bit(__FM10K_DOWN, &interface->state);
if (test_and_set_bit(__FM10K_DOWN, &interface->state))
return;
/* call carrier off first to avoid false dev_watchdog timeouts */
netif_carrier_off(netdev);