[PATCH v9 02/11] drm/panfrost: Don't sync rpm suspension after mmu flushing

From: Dmitry Osipenko
Date: Tue Nov 22 2022 - 22:00:36 EST


Lockdep warns about potential circular locking dependency of devfreq
with the fs_reclaim caused by immediate device suspension when mapping is
released by shrinker. Fix it by doing the suspension asynchronously.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
---
drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index e246d914e7f6..99a0975f6f03 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -273,7 +273,7 @@ static void panfrost_mmu_flush_range(struct panfrost_device *pfdev,
if (pm_runtime_active(pfdev->dev))
mmu_hw_do_operation(pfdev, mmu, iova, size, AS_COMMAND_FLUSH_PT);

- pm_runtime_put_sync_autosuspend(pfdev->dev);
+ pm_runtime_put_autosuspend(pfdev->dev);
}

static int mmu_map_sg(struct panfrost_device *pfdev, struct panfrost_mmu *mmu,
--
2.38.1