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Message-ID: <20150922213535.2774.9863.stgit@ahduyck-vm-fedora22> Date: Tue, 22 Sep 2015 14:35:35 -0700 From: Alexander Duyck <aduyck@...antis.com> To: netdev@...r.kernel.org, intel-wired-lan@...ts.osuosl.org Cc: jeffrey.t.kirsher@...el.com Subject: [net PATCH 2/3] 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@...antis.com> --- drivers/net/ethernet/intel/fm10k/fm10k_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c index 92d415584749..b5bcb8255260 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c @@ -1413,6 +1413,10 @@ 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 */ -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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