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drivers/perf: Fix ali_drw_pmu driver interrupt status clearing

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[ Upstream commit a3dd920977dccc453c550260c4b7605b280b79c3 ]

The alibaba_uncore_pmu driver forgot to clear all interrupt status
in the interrupt processing function. After the PMU counter overflow
interrupt occurred, an interrupt storm occurred, causing the system
to hang.

Therefore, clear the correct interrupt status in the interrupt handling
function to fix it.

Fixes: cf7b61073e ("drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC")
Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com>
Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/1724297611-20686-1-git-send-email-renyu.zj@linux.alibaba.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jing Zhang
2024-08-22 11:33:31 +08:00
committed by Greg Kroah-Hartman
parent 92dbc74464
commit 24f30b34ff
1 changed files with 1 additions and 1 deletions
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2
drivers/perf/alibaba_uncore_drw_pmu.c
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@@ -381,7 +381,7 @@ static irqreturn_t ali_drw_pmu_isr(int irq_num, void *data)
}
/* clear common counter intr status */
clr_status = FIELD_PREP(ALI_DRW_PMCOM_CNT_OV_INTR_MASK, 1);
clr_status = FIELD_PREP(ALI_DRW_PMCOM_CNT_OV_INTR_MASK, status);
writel(clr_status,
drw_pmu->cfg_base + ALI_DRW_PMU_OV_INTR_CLR);
}