From 8d7189d266ccec6dce1a4c2dd2bde6e0d632a24c Mon Sep 17 00:00:00 2001 From: Md Fahad Iqbal Polash Date: Thu, 28 Feb 2019 15:25:58 -0800 Subject: [PATCH] ice: Remove runtime change of PFINT_OICR_ENA register Runtime change of PFINT_OICR_ENA register is unnecessary. The handlers should always clear the atomic bit for each task as they start, because it will make sure that any late interrupt will either 1) re-set the bit, or 2) be handled directly in the "already running" task handler. Signed-off-by: Md Fahad Iqbal Polash Signed-off-by: Anirudh Venkataramanan Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ice/ice_main.c | 13 ++----------- drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c | 13 +------------ 2 files changed, 3 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index a32782b..8f6f2a1e 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -1096,7 +1096,7 @@ static void ice_handle_mdd_event(struct ice_pf *pf) u32 reg; int i; - if (!test_bit(__ICE_MDD_EVENT_PENDING, pf->state)) + if (!test_and_clear_bit(__ICE_MDD_EVENT_PENDING, pf->state)) return; /* find what triggered the MDD event */ @@ -1229,12 +1229,6 @@ static void ice_handle_mdd_event(struct ice_pf *pf) } } - /* re-enable MDD interrupt cause */ - clear_bit(__ICE_MDD_EVENT_PENDING, pf->state); - reg = rd32(hw, PFINT_OICR_ENA); - reg |= PFINT_OICR_MAL_DETECT_M; - wr32(hw, PFINT_OICR_ENA, reg); - ice_flush(hw); } /** @@ -1523,7 +1517,7 @@ static irqreturn_t ice_misc_intr(int __always_unused irq, void *data) rd32(hw, PFHMC_ERRORDATA)); } - /* Report and mask off any remaining unexpected interrupts */ + /* Report any remaining unexpected interrupts */ oicr &= ena_mask; if (oicr) { dev_dbg(&pf->pdev->dev, "unhandled interrupt oicr=0x%08x\n", @@ -1537,12 +1531,9 @@ static irqreturn_t ice_misc_intr(int __always_unused irq, void *data) set_bit(__ICE_PFR_REQ, pf->state); ice_service_task_schedule(pf); } - ena_mask &= ~oicr; } ret = IRQ_HANDLED; - /* re-enable interrupt causes that are not handled during this pass */ - wr32(hw, PFINT_OICR_ENA, ena_mask); if (!test_bit(__ICE_DOWN, pf->state)) { ice_service_task_schedule(pf); ice_irq_dynamic_ena(hw, NULL, NULL); diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c index f52f0fc5..abc9587 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c @@ -1273,21 +1273,10 @@ void ice_process_vflr_event(struct ice_pf *pf) int vf_id; u32 reg; - if (!test_bit(__ICE_VFLR_EVENT_PENDING, pf->state) || + if (!test_and_clear_bit(__ICE_VFLR_EVENT_PENDING, pf->state) || !pf->num_alloc_vfs) return; - /* Re-enable the VFLR interrupt cause here, before looking for which - * VF got reset. Otherwise, if another VF gets a reset while the - * first one is being processed, that interrupt will be lost, and - * that VF will be stuck in reset forever. - */ - reg = rd32(hw, PFINT_OICR_ENA); - reg |= PFINT_OICR_VFLR_M; - wr32(hw, PFINT_OICR_ENA, reg); - ice_flush(hw); - - clear_bit(__ICE_VFLR_EVENT_PENDING, pf->state); for (vf_id = 0; vf_id < pf->num_alloc_vfs; vf_id++) { struct ice_vf *vf = &pf->vf[vf_id]; u32 reg_idx, bit_idx; -- 2.7.4