This is a note to let you know that I've just added the patch titled
drivers/perf: Fix ali_drw_pmu driver interrupt status clearing
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drivers-perf-fix-ali_drw_pmu-driver-interrupt-status.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fa7a12e7422ccdb32e1f53f3069ecd1bf4a26a2c
Author: Jing Zhang <renyu.zj@xxxxxxxxxxxxxxxxx>
Date: Thu Aug 22 11:33:31 2024 +0800
drivers/perf: Fix ali_drw_pmu driver interrupt status clearing
[ 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@xxxxxxxxxxxxxxxxx>
Reviewed-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>
Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
Link: https://lore.kernel.org/r/1724297611-20686-1-git-send-email-renyu.zj@xxxxxxxxxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
}
