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 7f949f6f54ff593123ab95b6247bfa4542a65580 ]
The register por_dt_pmovsr Bits[7:0] indicates overflow from counters 7 to 0. But in arm_cmn_handle_irq(), only handled the overflow status of Bits[3:0] which results in unhandled overflow status of counters 4 to 7.
So let the overflow status of DTC counters 4 to 7 to be handled.
Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver") Signed-off-by: Jing Zhang renyu.zj@linux.alibaba.com Reviewed-by: Robin Murphy robin.murphy@arm.com Link: https://lore.kernel.org/r/1695612152-123633-1-git-send-email-renyu.zj@linux.... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/perf/arm-cmn.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 90008e24d1cc7..cfb36adf4eb80 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -1822,7 +1822,7 @@ static irqreturn_t arm_cmn_handle_irq(int irq, void *dev_id) u64 delta; int i;
- for (i = 0; i < CMN_DTM_NUM_COUNTERS; i++) { + for (i = 0; i < CMN_DT_NUM_COUNTERS; i++) { if (status & (1U << i)) { ret = IRQ_HANDLED; if (WARN_ON(!dtc->counters[i]))