drm: inline drm_pci_set_unique

This is only used for drm versions 1.0, and kms drivers have never
been there. So we can appropriately restrict this to legacy and hence
pci devices and inline everything.

v2: Make the dummy function actually return something, caught by Wu
Fengguang's 0-day tester.

v3: Fix spelling in comment (Thierry)

Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

3 files changed, 20 insertions, 9 deletions

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 93a42040bedb..53560ef53f99 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -93,7 +93,8 @@ drm_unset_busid(struct drm_device *dev,
  * Copies the bus id from userspace into drm_device::unique, and verifies that
  * it matches the device this DRM is attached to (EINVAL otherwise).  Deprecated
  * in interface version 1.1 and will return EBUSY when setversion has requested
- * version 1.1 or greater.
+ * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
+ * UMS was only ever supported on pci devices.
  */
 int drm_setunique(struct drm_device *dev, void *data,
                   struct drm_file *file_priv)
@@ -108,10 +109,13 @@ int drm_setunique(struct drm_device *dev, void *data,
         if (!u->unique_len || u->unique_len > 1024)
                 return -EINVAL;
 
-        if (!dev->driver->bus->set_unique)
+        if (drm_core_check_feature(dev, DRIVER_MODESET))
+                return 0;
+
+        if (WARN_ON(!dev->pdev))
                 return -EINVAL;
 
-        ret = dev->driver->bus->set_unique(dev, master, u);
+        ret = drm_pci_set_unique(dev, master, u);
         if (ret)
                 goto err;
 
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index eff29e311f70..c550b349f202 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -185,9 +185,9 @@ err:
         return ret;
 }
 
-static int drm_pci_set_unique(struct drm_device *dev,
-                              struct drm_master *master,
-                              struct drm_unique *u)
+int drm_pci_set_unique(struct drm_device *dev,
+                       struct drm_master *master,
+                       struct drm_unique *u)
 {
         int domain, bus, slot, func, ret;
         const char *bus_name;
@@ -314,7 +314,6 @@ void drm_pci_agp_destroy(struct drm_device *dev)
 static struct drm_bus drm_pci_bus = {
         .get_name = drm_pci_get_name,
         .set_busid = drm_pci_set_busid,
-        .set_unique = drm_pci_set_unique,
 };
 
 /**
@@ -481,6 +480,13 @@ int drm_irq_by_busid(struct drm_device *dev, void *data,
 {
         return -EINVAL;
 }
+
+int drm_pci_set_unique(struct drm_device *dev,
+                       struct drm_master *master,
+                       struct drm_unique *u)
+{
+        return -EINVAL;
+}
 #endif
 
 EXPORT_SYMBOL(drm_pci_init);
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index f4d0eaa3da46..1a9d509bef66 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -728,8 +728,6 @@ struct drm_master {
 struct drm_bus {
         const char *(*get_name)(struct drm_device *dev);
         int (*set_busid)(struct drm_device *dev, struct drm_master *master);
-        int (*set_unique)(struct drm_device *dev, struct drm_master *master,
-                          struct drm_unique *unique);
 };
 
 /**
@@ -1511,6 +1509,9 @@ extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
                                        size_t align);
 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
+extern int drm_pci_set_unique(struct drm_device *dev,
+                              struct drm_master *master,
+                              struct drm_unique *u);
 
                                /* sysfs support (drm_sysfs.c) */
 struct drm_sysfs_class;