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 6.6-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-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 78ee4c59d34f8af86f2758e2c3d3810509dfe535
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 19d459a36be55..818ce4424d34d 100644
--- a/drivers/perf/alibaba_uncore_drw_pmu.c
+++ b/drivers/perf/alibaba_uncore_drw_pmu.c
@@ -408,7 +408,7 @@ 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);
}
