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igb: Unpair the queues when changing the number of queues 

By the commit 72ddef0506 ("igb: Fix oops caused by missing queue
pairing"), the IGB_FLAG_QUEUE_PAIRS flag can now be set when changing the
number of queues by "ethtool -L", but it is never cleared unless the igb
driver is reloaded.
This patch clears it if queue pairing becomes unnecessary as a result of
"ethtool -L".

Signed-off-by: Shota Suzuki <suzuki_shota_t3@lab.ntt.co.jp>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shota Suzuki 2015-12-11 18:44:00 +09:00 committed by Jeff Kirsher
parent ceb2775998
commit 37a5d163fb
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/intel/igb/igb_main.c
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@ -2931,6 +2931,8 @@ void igb_set_flag_queue_pairs(struct igb_adapter *adapter,
*/
if (adapter->rss_queues > (max_rss_queues / 2))
adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
else
adapter->flags &= ~IGB_FLAG_QUEUE_PAIRS;
break;
}
}