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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@zju.edu.cn>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dinghao Liu 2020-05-20 18:14:53 +08:00 committed by Greg Kroah-Hartman
parent 2477158bfd
commit f6331bfccc
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/nouveau/nouveau_debugfs.c
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@ -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)