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i40e/i40evf: Fix handling of napi budget

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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>
This commit is contained in:
Alexander Duyck 2015-09-24 09:04:26 -07:00 committed by Jeff Kirsher
parent 51161aa98d
commit c67caceb86
2 changed files with 10 additions and 0 deletions
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5
drivers/net/ethernet/intel/i40e/i40e_txrx.c
View file

@ -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;

5
drivers/net/ethernet/intel/i40evf/i40e_txrx.c
View file

@ -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;