6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>
[ Upstream commit 043e8afebf6c19abde9da1ac3d5cbf8b7ac8393f ]
Commit f11b0417eec2 ("drm/panfrost: Add fdinfo support GPU load metrics")
retrieves the OPP for the maximum device clock frequency, but forgets to
keep the reference count balanced by putting the returned OPP object. This
eventually leads to an OPP core warning when removing the device.
Fix it by putting OPP objects as many times as they're retrieved.
Also remove an unnecessary whitespace.
Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>
Fixes: f11b0417eec2 ("drm/panfrost: Add fdinfo support GPU load metrics")
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Reviewed-by: Liviu Dudau <liviu.dudau@xxxxxxx>
Signed-off-by: Steven Price <steven.price@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241105205458.1318989-1-adrian.larumbe@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 2d30da38c2c3e..3385fd3ef41a4 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -38,7 +38,7 @@ static int panfrost_devfreq_target(struct device *dev, unsigned long *freq,
return PTR_ERR(opp);
dev_pm_opp_put(opp);
- err = dev_pm_opp_set_rate(dev, *freq);
+ err = dev_pm_opp_set_rate(dev, *freq);
if (!err)
ptdev->pfdevfreq.current_frequency = *freq;
@@ -182,6 +182,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
* if any and will avoid a switch off by regulator_late_cleanup()
*/
ret = dev_pm_opp_set_opp(dev, opp);
+ dev_pm_opp_put(opp);
if (ret) {
DRM_DEV_ERROR(dev, "Couldn't set recommended OPP\n");
return ret;
--
2.43.0
