i40e: clear only cause_ena bit
When disabling interrupts, we should only be clearing the CAUSE_ENA bit,
not clearing the whole register. Clearing the whole register sets the
NEXTQ_IDX field to 0 instead of 0x7ff which can confuse the Firmware in
some reset sequences.
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Mitch Williams <mitch.a.williams@intel.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_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index b743eca..5d82ff5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -3588,14 +3588,24 @@ static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
int base = vsi->base_vector;
int i;
+ /* disable interrupt causation from each queue */
for (i = 0; i < vsi->num_queue_pairs; i++) {
- wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
- wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
+ u32 val;
+
+ val = rd32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx));
+ val &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
+ wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), val);
+
+ val = rd32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx));
+ val &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
+ wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), val);
+
if (!i40e_enabled_xdp_vsi(vsi))
continue;
wr32(hw, I40E_QINT_TQCTL(vsi->xdp_rings[i]->reg_idx), 0);
}
+ /* disable each interrupt */
if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
for (i = vsi->base_vector;
i < (vsi->num_q_vectors + vsi->base_vector); i++)