drm: Extract drm_is_current_master

Just rolling out a bit of abstraction to be able to clean
up the master logic in the next step.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_auth.c

@@ -183,7 +183,7 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 	int ret = 0;
 
 	mutex_lock(&dev->master_mutex);
-	if (file_priv->is_master)
+	if (drm_is_current_master(file_priv))
 		goto out_unlock;
 
 	if (dev->master) {
@@ -222,7 +222,7 @@ int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 	int ret = -EINVAL;
 
 	mutex_lock(&dev->master_mutex);
-	if (!file_priv->is_master)
+	if (!drm_is_current_master(file_priv))
 		goto out_unlock;
 
 	if (!dev->master)
@@ -261,7 +261,7 @@ void drm_master_release(struct drm_file *file_priv)
 	if (file_priv->magic)
 		idr_remove(&file_priv->master->magic_map, file_priv->magic);
 
-	if (!file_priv->is_master)
+	if (!drm_is_current_master(file_priv))
 		goto out;
 
 	if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
@@ -289,6 +289,12 @@ void drm_master_release(struct drm_file *file_priv)
 	mutex_unlock(&dev->master_mutex);
 }
 
+bool drm_is_current_master(struct drm_file *fpriv)
+{
+	return fpriv->is_master;
+}
+EXPORT_SYMBOL(drm_is_current_master);
+
 struct drm_master *drm_master_get(struct drm_master *master)
 {
 	kref_get(&master->refcount);

drivers/gpu/drm/drm_crtc.c

@@ -3643,7 +3643,7 @@ int drm_mode_getfb(struct drm_device *dev,
 	r->bpp = fb->bits_per_pixel;
 	r->pitch = fb->pitches[0];
 	if (fb->funcs->create_handle) {
-		if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
+		if (drm_is_current_master(file_priv) || capable(CAP_SYS_ADMIN) ||
 		    drm_is_control_client(file_priv)) {
 			ret = fb->funcs->create_handle(fb, file_priv,
 						       &r->handle);

drivers/gpu/drm/drm_info.c

@@ -102,7 +102,7 @@ int drm_clients_info(struct seq_file *m, void *data)
 			   task ? task->comm : "<unknown>",
 			   pid_vnr(priv->pid),
 			   priv->minor->index,
-			   priv->is_master ? 'y' : 'n',
+			   drm_is_current_master(priv) ? 'y' : 'n',
 			   priv->authenticated ? 'y' : 'n',
 			   from_kuid_munged(seq_user_ns(m), priv->uid),
 			   priv->magic);

drivers/gpu/drm/drm_ioctl.c

@@ -481,7 +481,8 @@ int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
 		return -EACCES;
 
 	/* MASTER is only for master or control clients */
-	if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
+	if (unlikely((flags & DRM_MASTER) && 
+		     !drm_is_current_master(file_priv) &&
 		     !drm_is_control_client(file_priv)))
 		return -EACCES;
 

drivers/gpu/drm/drm_lock.c

@@ -219,7 +219,7 @@ int drm_legacy_lock(struct drm_device *dev, void *data,
 	/* don't set the block all signals on the master process for now 
 	 * really probably not the correct answer but lets us debug xkb
  	 * xserver for now */
-	if (!file_priv->is_master) {
+	if (!drm_is_current_master(file_priv)) {
 		dev->sigdata.context = lock->context;
 		dev->sigdata.lock = master->lock.hw_lock;
 	}

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -1446,7 +1446,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 
 	dispatch_flags = 0;
 	if (args->flags & I915_EXEC_SECURE) {
-		if (!file->is_master || !capable(CAP_SYS_ADMIN))
+		if (!drm_is_current_master(file) || !capable(CAP_SYS_ADMIN))
 		    return -EPERM;
 
 		dispatch_flags |= I915_DISPATCH_SECURE;
@@ -1553,7 +1553,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 							     batch_obj,
 							     args->batch_start_offset,
 							     args->batch_len,
-							     file->is_master);
+							     drm_is_current_master(file));
 		if (IS_ERR(parsed_batch_obj)) {
 			ret = PTR_ERR(parsed_batch_obj);
 			goto err;

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -1049,7 +1049,7 @@ static struct vmw_master *vmw_master_check(struct drm_device *dev,
 	if (unlikely(ret != 0))
 		return ERR_PTR(-ERESTARTSYS);
 
-	if (file_priv->is_master) {
+	if (drm_is_current_master(file_priv)) {
 		mutex_unlock(&dev->master_mutex);
 		return NULL;
 	}

include/drm/drmP.h

@@ -1014,14 +1014,15 @@ static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc
 extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
 extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
 
-				/* Stub support (drm_stub.h) */
-extern struct drm_master *drm_master_get(struct drm_master *master);
-extern void drm_master_put(struct drm_master **master);
-
-extern void drm_put_dev(struct drm_device *dev);
-extern void drm_unplug_dev(struct drm_device *dev);
+/* drm_auth.c */
+struct drm_master *drm_master_get(struct drm_master *master);
+void drm_master_put(struct drm_master **master);
+bool drm_is_current_master(struct drm_file *fpriv);
+
+/* drm_drv.c */
+void drm_put_dev(struct drm_device *dev);
+void drm_unplug_dev(struct drm_device *dev);
 extern unsigned int drm_debug;
-extern bool drm_atomic;
 
 				/* Debugfs support */
 #if defined(CONFIG_DEBUG_FS)