This is a note to let you know that I've just added the patch titled drm/panfrost: Don't sync rpm suspension after mmu flushing to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-panfrost-don-t-sync-rpm-suspension-after-mmu-flu.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 05ffa1f61c56dc52a285ba349e6d32c26b501564 Author: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx> Date: Thu Nov 17 04:40:38 2022 +0300 drm/panfrost: Don't sync rpm suspension after mmu flushing [ Upstream commit ba3be66f11c3c49afaa9f49b99e21d88756229ef ] 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. Reviewed-by: Steven Price <steven.price@xxxxxxx> Fixes: ec7eba47da86 ("drm/panfrost: Rework page table flushing and runtime PM interaction") Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx> Link: https://lore.kernel.org/all/20230108210445.3948344-3-dmitry.osipenko@xxxxxxxxxxxxx/ Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index c3292a6bd1ae8..d6dda97e2591d 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -253,7 +253,7 @@ 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,