This is a note to let you know that I've just added the patch titled drm/nouveau/debugfs: fix runtime pm imbalance on error to the 5.4-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-nouveau-debugfs-fix-runtime-pm-imbalance-on-erro.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 0e1065ef5e10e84daf08fa212f3b3a5b77fb7cf8 Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx> Date: Wed May 20 18:14:53 2020 +0800 drm/nouveau/debugfs: fix runtime pm imbalance on error [ Upstream commit 00583fbe8031f69bba8b0a9a861efb75fb7131af ] pm_runtime_get_sync() increments the runtime PM usage counter even the call returns an error code. Thus a pairing decrement is needed on the error handling path to keep the counter balanced. Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx> Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c index 5c314f135dd10..3b13feca970f7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c +++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c @@ -183,8 +183,11 @@ nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, } ret = pm_runtime_get_sync(drm->dev); - if (ret < 0 && ret != -EACCES) + if (ret < 0 && ret != -EACCES) { + pm_runtime_put_autosuspend(drm->dev); return ret; + } + ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args)); pm_runtime_put_autosuspend(drm->dev); if (ret < 0)