[PATCH 5.8 099/464] drm/nouveau: fix multiple instances of reference count leaks

[Greg Kroah-Hartman]

From: Aditya Pakki <pakki...@umn.edu>

[ Upstream commit 659fb5f154c3434c90a34586f3b7aa1c39cf6062 ]

On calling pm_runtime_get_sync() the reference count of the device
is incremented. In case of failure, decrement the
ref count before returning the error.

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
Signed-off-by: Ben Skeggs <bske...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/nouveau/nouveau_drm.c | 8 ++++++--
 drivers/gpu/drm/nouveau/nouveau_gem.c | 4 +++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c 
b/drivers/gpu/drm/nouveau/nouveau_drm.c
index ac93d12201dc0..880d962c1b19a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -1026,8 +1026,10 @@ nouveau_drm_open(struct drm_device *dev, struct drm_file 
*fpriv)
 
        /* need to bring up power immediately if opening device */
        ret = pm_runtime_get_sync(dev->dev);
-       if (ret < 0 && ret != -EACCES)
+       if (ret < 0 && ret != -EACCES) {
+               pm_runtime_put_autosuspend(dev->dev);
                return ret;
+       }
 
        get_task_comm(tmpname, current);
        snprintf(name, sizeof(name), "%s[%d]", tmpname, pid_nr(fpriv->pid));
@@ -1109,8 +1111,10 @@ nouveau_drm_ioctl(struct file *file, unsigned int cmd, 
unsigned long arg)
        long ret;
 
        ret = pm_runtime_get_sync(dev->dev);
-       if (ret < 0 && ret != -EACCES)
+       if (ret < 0 && ret != -EACCES) {
+               pm_runtime_put_autosuspend(dev->dev);
                return ret;
+       }
 
        switch (_IOC_NR(cmd) - DRM_COMMAND_BASE) {
        case DRM_NOUVEAU_NVIF:
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c 
b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 4c3f131ad31da..c5ee5b7364a09 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -45,8 +45,10 @@ nouveau_gem_object_del(struct drm_gem_object *gem)
        int ret;
 
        ret = pm_runtime_get_sync(dev);
-       if (WARN_ON(ret < 0 && ret != -EACCES))
+       if (WARN_ON(ret < 0 && ret != -EACCES)) {
+               pm_runtime_put_autosuspend(dev);
                return;
+       }
 
        if (gem->import_attach)
                drm_prime_gem_destroy(gem, nvbo->bo.sg);
-- 
2.25.1