This funciton is only called from drm_gem_map_dma_buf(). It's supposed to return error pointers on failure and returning a NULL pointer will lead to a NULL dereference.
Fixes: 78467dc5f70f ("drm/cma: add low-level hook functions to use prime helpers") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com
diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c index 80a5115c3846..f8a9c09efb87 100644 --- a/drivers/gpu/drm/drm_gem_cma_helper.c +++ b/drivers/gpu/drm/drm_gem_cma_helper.c @@ -436,7 +436,7 @@ struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj)
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); if (!sgt) - return NULL; + return ERR_PTR(-EINVAL);
ret = dma_get_sgtable(obj->dev->dev, sgt, cma_obj->vaddr, cma_obj->paddr, obj->size); @@ -447,7 +447,7 @@ struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj)
out: kfree(sgt); - return NULL; + return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(drm_gem_cma_prime_get_sg_table);