From d34deab907605a81eec83afe006fad2e5b4673b4 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 23 Apr 2018 17:46:08 -0700 Subject: [PATCH] drm: Make the prime vmap/vunmap hooks optional. Some drivers leave these unimplemented, so don't make them have unimplemented stubs. Signed-off-by: Eric Anholt Link: https://patchwork.freedesktop.org/patch/msgid/20180424004610.4637-2-eric@anholt.net Reviewed-by: Daniel Vetter --- drivers/gpu/drm/drm_prime.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index caf675e3e692..397b46b33739 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -409,7 +409,10 @@ void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf) struct drm_gem_object *obj = dma_buf->priv; struct drm_device *dev = obj->dev; - return dev->driver->gem_prime_vmap(obj); + if (dev->driver->gem_prime_vmap) + return dev->driver->gem_prime_vmap(obj); + else + return NULL; } EXPORT_SYMBOL(drm_gem_dmabuf_vmap); @@ -426,7 +429,8 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) struct drm_gem_object *obj = dma_buf->priv; struct drm_device *dev = obj->dev; - dev->driver->gem_prime_vunmap(obj, vaddr); + if (dev->driver->gem_prime_vunmap) + dev->driver->gem_prime_vunmap(obj, vaddr); } EXPORT_SYMBOL(drm_gem_dmabuf_vunmap); -- 2.30.2