4 files changed, 15 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 123de28f94e..9c14f633772 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -129,7 +129,8 @@ int drm_open(struct inode *inode, struct file *filp)
 	minor = idr_find(&drm_minors_idr, minor_id);
 	if (!minor)
 		return -ENODEV;
-
+	if (IS_ERR(minor))
+		return PTR_ERR(minor);
 	if (!(dev = minor->dev))
 		return -ENODEV;
 
@@ -180,7 +181,10 @@ int drm_stub_open(struct inode *inode, struct file *filp)
 	minor = idr_find(&drm_minors_idr, minor_id);
 	if (!minor)
 		goto out;
-
+	if (IS_ERR(minor)) {
+		err = PTR_ERR(minor);
+		goto out;
+	}
 	if (!(dev = minor->dev))
 		goto out;
 
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 13f3d936472..b3216724122 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -367,6 +367,10 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 
 	list_add_tail(&dev->driver_item, &driver->device_list);
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		idr_replace(&drm_minors_idr, dev->control, dev->control->index);
+	idr_replace(&drm_minors_idr, dev->primary, dev->primary->index);
+
 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
 		 driver->name, driver->major, driver->minor, driver->patchlevel,
 		 driver->date, pci_name(pdev), dev->primary->index);
diff --git a/drivers/gpu/drm/drm_platform.c b/drivers/gpu/drm/drm_platform.c
index 82431dcae37..d749389a15a 100644
--- a/drivers/gpu/drm/drm_platform.c
+++ b/drivers/gpu/drm/drm_platform.c
@@ -90,6 +90,10 @@ int drm_get_platform_dev(struct platform_device *platdev,
 
 	list_add_tail(&dev->driver_item, &driver->device_list);
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		idr_replace(&drm_minors_idr, dev->control, dev->control->index);
+	idr_replace(&drm_minors_idr, dev->primary, dev->primary->index);
+
 	mutex_unlock(&drm_global_mutex);
 
 	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 21bcd4a555d..0251c38ac26 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -356,7 +356,7 @@ int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
 	new_minor->index = minor_id;
 	INIT_LIST_HEAD(&new_minor->master_list);
 
-	idr_replace(&drm_minors_idr, new_minor, minor_id);
+	idr_replace(&drm_minors_idr, ERR_PTR(-EAGAIN), minor_id);
 
 	if (type == DRM_MINOR_LEGACY) {
 		ret = drm_proc_init(new_minor, minor_id, drm_proc_root);