From c67caceb864cf15731532ab25162166c228fa270 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Thu, 24 Sep 2015 09:04:26 -0700 Subject: [PATCH] i40e/i40evf: Fix handling of napi budget The polling routine for i40e was rounding up the budget for Rx cleanup to 1. This is incorrect as the netpoll poll call is expecting no Rx to be processed as the budget passed was 0. Signed-off-by: Alexander Duyck Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 5 +++++ drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 01e5ece8046d..b560e0257ba6 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1846,6 +1846,10 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) ring->arm_wb = false; } + /* Handle case where we are called by netpoll with a budget of 0 */ + if (budget <= 0) + goto tx_only; + /* We attempt to distribute budget to each Rx queue fairly, but don't * allow the budget to go below 1 because that would exit polling early. */ @@ -1862,6 +1866,7 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) /* If work not completed, return budget and polling will return */ if (!clean_complete) { +tx_only: if (arm_wb) i40e_force_wb(vsi, q_vector); return budget; diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 0e71eb4633d5..1894cc8c0524 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -1287,6 +1287,10 @@ int i40evf_napi_poll(struct napi_struct *napi, int budget) ring->arm_wb = false; } + /* Handle case where we are called by netpoll with a budget of 0 */ + if (budget <= 0) + goto tx_only; + /* We attempt to distribute budget to each Rx queue fairly, but don't * allow the budget to go below 1 because that would exit polling early. */ @@ -1303,6 +1307,7 @@ int i40evf_napi_poll(struct napi_struct *napi, int budget) /* If work not completed, return budget and polling will return */ if (!clean_complete) { +tx_only: if (arm_wb) i40evf_force_wb(vsi, q_vector); return budget; -- 2.20.1