From c16db736653f5319d1d9b0d176f1f80394bd2614 Mon Sep 17 00:00:00 2001 From: Xiang Chen Date: Fri, 11 Aug 2017 00:09:27 +0800 Subject: [PATCH] scsi: hisi_sas: avoid potential v2 hw interrupt issue When some interrupts happen together, we need to process every interrupt one-by-one, and should not return immediately when one interrupt process is finished being processed. Signed-off-by: Xiang Chen Signed-off-by: John Garry Signed-off-by: Martin K. Petersen --- drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c index a6be33c36e86..8c504b437567 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -2606,6 +2606,7 @@ static irqreturn_t int_phy_updown_v2_hw(int irq_no, void *p) struct hisi_hba *hisi_hba = p; u32 irq_msk; int phy_no = 0; + irqreturn_t res = IRQ_NONE; irq_msk = (hisi_sas_read32(hisi_hba, HGC_INVLD_DQE_INFO) >> HGC_INVLD_DQE_INFO_FB_CH0_OFF) & 0x1ff; @@ -2620,15 +2621,15 @@ static irqreturn_t int_phy_updown_v2_hw(int irq_no, void *p) case CHL_INT0_SL_PHY_ENABLE_MSK: /* phy up */ if (phy_up_v2_hw(phy_no, hisi_hba) == - IRQ_NONE) - return IRQ_NONE; + IRQ_HANDLED) + res = IRQ_HANDLED; break; case CHL_INT0_NOT_RDY_MSK: /* phy down */ if (phy_down_v2_hw(phy_no, hisi_hba) == - IRQ_NONE) - return IRQ_NONE; + IRQ_HANDLED) + res = IRQ_HANDLED; break; case (CHL_INT0_NOT_RDY_MSK | @@ -2638,13 +2639,13 @@ static irqreturn_t int_phy_updown_v2_hw(int irq_no, void *p) if (reg_value & BIT(phy_no)) { /* phy up */ if (phy_up_v2_hw(phy_no, hisi_hba) == - IRQ_NONE) - return IRQ_NONE; + IRQ_HANDLED) + res = IRQ_HANDLED; } else { /* phy down */ if (phy_down_v2_hw(phy_no, hisi_hba) == - IRQ_NONE) - return IRQ_NONE; + IRQ_HANDLED) + res = IRQ_HANDLED; } break; @@ -2657,7 +2658,7 @@ static irqreturn_t int_phy_updown_v2_hw(int irq_no, void *p) phy_no++; } - return IRQ_HANDLED; + return res; } static void phy_bcast_v2_hw(int phy_no, struct hisi_hba *hisi_hba) -- 2.20.1