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ixgbe: Fix handling of NAPI budget when multiple queues are enabled per vector 

This patch corrects an issue in which the polling routine would increase
the budget for Rx to at least 1 per queue if multiple queues were present.
This would result in Rx packets being processed when the budget was 0 which
is meant to indicate that no Rx can be handled.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Darin Miller <darin.j.miller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2015-09-22 14:35:41 -07:00 committed by Jeff Kirsher
parent 9f87298647
commit 5d6002b7b8
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -2783,7 +2783,8 @@ int ixgbe_poll(struct napi_struct *napi, int budget)
ixgbe_for_each_ring(ring, q_vector->tx)
clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
if (!ixgbe_qv_lock_napi(q_vector))
/* Exit if we are called by netpoll or busy polling is active */
if ((budget <= 0) || !ixgbe_qv_lock_napi(q_vector))
return budget;
/* attempt to distribute budget to each queue fairly, but don't allow