In current driver, the counter will start firstly and then be configured. This sequence is not correct for AXI filter events since the correct AXI_MASK and AXI_ID are not set yet. Then the results may be inaccurate. Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx> --- Changes in v5: - new patch --- drivers/perf/fsl_imx9_ddr_perf.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/perf/fsl_imx9_ddr_perf.c b/drivers/perf/fsl_imx9_ddr_perf.c index f4dca813b174..2cd5bcf1d3d1 100644 --- a/drivers/perf/fsl_imx9_ddr_perf.c +++ b/drivers/perf/fsl_imx9_ddr_perf.c @@ -498,12 +498,12 @@ static int ddr_perf_event_add(struct perf_event *event, int flags) hwc->idx = counter; hwc->state |= PERF_HES_STOPPED; - if (flags & PERF_EF_START) - ddr_perf_event_start(event, flags); - /* read trans, write trans, read beat */ imx93_ddr_perf_monitor_config(pmu, cfg, cfg1, cfg2); + if (flags & PERF_EF_START) + ddr_perf_event_start(event, flags); + return 0; } -- 2.34.1
