fm10k: 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: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index e76a44cf330cd47d57084a05fd69611985a79e15..746a1986690b1828be5120bf63f5297777d7b26b 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -1428,6 +1428,10 @@ static int fm10k_poll(struct napi_struct *napi, int budget)
        fm10k_for_each_ring(ring, q_vector->tx)
                clean_complete &= fm10k_clean_tx_irq(q_vector, ring);
 
+       /* Handle case where we are called by netpoll with a budget of 0 */
+       if (budget <= 0)
+               return budget;
+
        /* attempt to distribute budget to each queue fairly, but don't
         * allow the budget to go below 1 because we'll exit polling
         */