diff mbox series

[v5,3/7] perf: imx_perf: fix counter start and config sequence

Message ID 20240307024754.3469810-3-xu.yang_2@nxp.com (mailing list archive)
State New, archived
Headers show
Series [v5,1/7] dt-bindings: perf: fsl-imx-ddr: Add i.MX95 compatible | expand

Commit Message

Xu Yang March 7, 2024, 2:47 a.m. UTC 
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@nxp.com>

---
Changes in v5:
 - new patch
---
 drivers/perf/fsl_imx9_ddr_perf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

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;
 }