From 5e8230663d7010fcb43f176b9cc65aecbdcadbc8 Mon Sep 17 00:00:00 2001 From: Anjali Singhai Jain Date: Wed, 18 Dec 2013 13:45:49 +0000 Subject: [PATCH] i40e: Re-enable interrupt on ICR0 The hardware can occasionally give an interrupt on the misc queue for which there is no driver work to do. In that case the driver was not re-enabling interrupts even though they were auto masked by hardware. This left interrupts disabled on this queue. Re-enable the interrupt whenever leaving this function. Signed-off-by: Anjali Singhai Jain Signed-off-by: Jesse Brandeburg Tested-by: Kavindya Deegala Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index f736c44..38ec66f 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -2758,16 +2758,16 @@ static irqreturn_t i40e_intr(int irq, void *data) { struct i40e_pf *pf = (struct i40e_pf *)data; struct i40e_hw *hw = &pf->hw; + irqreturn_t ret = IRQ_NONE; u32 icr0, icr0_remaining; u32 val, ena_mask; icr0 = rd32(hw, I40E_PFINT_ICR0); + ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA); /* if sharing a legacy IRQ, we might get called w/o an intr pending */ if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0) - return IRQ_NONE; - - ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA); + goto enable_intr; /* if interrupt but no bits showing, must be SWINT */ if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) || @@ -2843,7 +2843,9 @@ static irqreturn_t i40e_intr(int irq, void *data) } ena_mask &= ~icr0_remaining; } + ret = IRQ_HANDLED; +enable_intr: /* re-enable interrupt causes */ wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask); if (!test_bit(__I40E_DOWN, &pf->state)) { @@ -2851,7 +2853,7 @@ static irqreturn_t i40e_intr(int irq, void *data) i40e_irq_dynamic_enable_icr0(pf); } - return IRQ_HANDLED; + return ret; } /** -- 2.7.4