drm: rip out drm_core_has_AGP

Most place actually want to just check for dev->agp (most do, but a
few don't so this fixes a few potential NULL derefs). The only
exception is the agp init code which should check for the AGP driver
feature flag.

Signed-off-by: Daniel Vetter <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/drm_agpsupport.c

···
 {
 	struct drm_agp_mem *entry, *tempe;
 
-	if (!drm_core_has_AGP(dev) || !dev->agp)
+	if (!dev->agp)
 		return;
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
 		return;

drivers/gpu/drm/drm_bufs.c

···
 		struct drm_agp_mem *entry;
 		int valid = 0;
 
-		if (!drm_core_has_AGP(dev)) {
+		if (!dev->agp) {
 			kfree(map);
 			return -EINVAL;
 		}
···
 	spin_unlock(&dev->count_lock);
 
 	if (request->count >= dma->buf_count) {
-		if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP))
+		if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
 		    || (drm_core_check_feature(dev, DRIVER_SG)
 			&& (dma->flags & _DRM_DMA_USE_SG))) {
 			struct drm_local_map *map = dev->agp_buffer_map;

drivers/gpu/drm/drm_memory.c

···
 
 void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev)
 {
-	if (drm_core_has_AGP(dev) &&
-	    dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+	if (dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
 		map->handle = agp_remap(map->offset, map->size, dev);
 	else
 		map->handle = ioremap(map->offset, map->size);
···
 
 void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev)
 {
-	if (drm_core_has_AGP(dev) &&
-	    dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+	if (dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
 		map->handle = agp_remap(map->offset, map->size, dev);
 	else
 		map->handle = ioremap_wc(map->offset, map->size);
···
 	if (!map->handle || !map->size)
 		return;
 
-	if (drm_core_has_AGP(dev) &&
-	    dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+	if (dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
 		vunmap(map->handle);
 	else
 		iounmap(map->handle);

drivers/gpu/drm/drm_pci.c

···
 
 static void drm_pci_agp_init(struct drm_device *dev)
 {
-	if (drm_core_has_AGP(dev)) {
+	if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
 		if (drm_pci_device_is_agp(dev))
 			dev->agp = drm_agp_init(dev);
 		if (dev->agp) {
···
 
 static void drm_pci_agp_destroy(struct drm_device *dev)
 {
-	if (drm_core_has_AGP(dev) && dev->agp) {
+	if (dev->agp) {
 		arch_phys_wc_del(dev->agp->agp_mtrr);
 		drm_agp_clear(dev);
 		drm_agp_destroy(dev->agp);

drivers/gpu/drm/drm_vm.c

···
 	/*
 	 * Find the right map
 	 */
-	if (!drm_core_has_AGP(dev))
+	if (!dev->agp)
 		goto vm_fault_error;
 
 	if (!dev->agp || !dev->agp->cant_use_aperture)
···
 	switch (map->type) {
 #if !defined(__arm__)
 	case _DRM_AGP:
-		if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) {
+		if (dev->agp && dev->agp->cant_use_aperture) {
 			/*
 			 * On some platforms we can't talk to bus dma address from the CPU, so for
 			 * memory of type DRM_AGP, we'll deal with sorting out the real physical

drivers/gpu/drm/radeon/radeon_ttm.c

···
 		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 #if __OS_HAS_AGP
 		if (rdev->flags & RADEON_IS_AGP) {
-			if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
+			if (!rdev->ddev->agp) {
 				DRM_ERROR("AGP is not enabled for memory type %u\n",
 					  (unsigned)type);
 				return -EINVAL;

include/drm/drm_agpsupport.h

···
 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
 int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv);
-
-static inline int drm_core_has_AGP(struct drm_device *dev)
-{
-	return drm_core_check_feature(dev, DRIVER_USE_AGP);
-}
-
 #else /* __OS_HAS_AGP */
 
 static inline void drm_free_agp(DRM_AGP_MEM * handle, int pages)
···
 {
 	return -ENODEV;
 }
-
-static inline int drm_core_has_AGP(struct drm_device *dev)
-{
-	return 0;
-}
-
 #endif /* __OS_HAS_AGP */
 
 #endif /* _DRM_AGPSUPPORT_H_ */