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 <aduyck@mirantis.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 01e5ece8046d180c438adef1dc1198a40305c1cd..b560e0257ba6a2a12184b1c7bda77689d3f7cfc0 100644 (file)
--- 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 0e71eb4633d5cd739a1ba5216c9dc7c7e442c97b..1894cc8c0524bc270bba946cc8ed481ea9d8359f 100644 (file)
--- 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;