6.1-stable review patch. If anyone has any objections, please let me know.
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From: Jing Zhang renyu.zj@linux.alibaba.com
[ 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: cf7b61073e45 ("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.a... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/perf/alibaba_uncore_drw_pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/perf/alibaba_uncore_drw_pmu.c b/drivers/perf/alibaba_uncore_drw_pmu.c index a7689fecb49d9..0a57502de4284 100644 --- a/drivers/perf/alibaba_uncore_drw_pmu.c +++ b/drivers/perf/alibaba_uncore_drw_pmu.c @@ -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); }