To protect access to the metrics table.
Bug: https://gitlab.freedesktop.org/drm/amd/issues/900
Signed-off-by: Alex Deucher <[email protected]>
---
drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 15403b7979d6..102fddda925b 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -564,6 +564,7 @@ static int navi10_get_metrics_table(struct smu_context *smu,
struct smu_table_context *smu_table= &smu->smu_table;
int ret = 0;
+ mutex_lock(&smu->metrics_lock);
if (!smu_table->metrics_time || time_after(jiffies,
smu_table->metrics_time + msecs_to_jiffies(100))) {
ret = smu_update_table(smu, SMU_TABLE_SMU_METRICS, 0,
(void *)smu_table->metrics_table, false);
@@ -575,6 +576,7 @@ static int navi10_get_metrics_table(struct smu_context *smu,
}
memcpy(metrics_table, smu_table->metrics_table, sizeof(SmuMetrics_t));
+ mutex_unlock(&smu->metrics_lock);
return ret;
}
--
2.23.0
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