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i40e/i40evf: fix accidental write to ITR registers

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Fix a bug introduced in the force writeback code, where the interrupt
rate was set to 0 (maximum) by accident.

The driver must correctly set the NOITR fields to avoid ITR update
as a side effect of triggering the software interrupt.

Change-ID: I290851ae04ef3811c43aab5ee33242029f26c1a3
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jesse Brandeburg
2015-02-27 09:18:32 +00:00
committed by Jeff Kirsher
parent 3c8e0b989a
commit 97bf75f169
3 changed files with 5 additions and 0 deletions
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drivers/net/ethernet/intel/i40e/i40e_txrx.c
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@@ -859,6 +859,7 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget)
static void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector)
{
u32 val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
I40E_PFINT_DYN_CTLN_ITR_INDX_MASK | /* set noitr */
I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK |
I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK;
/* allow 00 to be written to the index */