drm/msm: Fix 32b size truncation

Somehow we never noticed this when arm64 became a thing, many years ago.

v2: also fix npages

Signed-off-by: Rob Clark <[e-mail]>
Tested-by: Connor Abbott <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/669785/

drivers/gpu/drm/msm/msm_gem.c

···
 	if (!msm_obj->pages) {
 		struct drm_device *dev = obj->dev;
 		struct page **p;
-		int npages = obj->size >> PAGE_SHIFT;
+		size_t npages = obj->size >> PAGE_SHIFT;
 
 		p = drm_gem_get_pages(obj);
 
···
 
 /* convenience method to construct a GEM buffer object, and userspace handle */
 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
-		uint32_t size, uint32_t flags, uint32_t *handle,
+		size_t size, uint32_t flags, uint32_t *handle,
 		char *name)
 {
 	struct drm_gem_object *obj;
···
 	.vm_ops = &vm_ops,
 };
 
-static int msm_gem_new_impl(struct drm_device *dev,
-		uint32_t size, uint32_t flags,
-		struct drm_gem_object **obj)
+static int msm_gem_new_impl(struct drm_device *dev, uint32_t flags,
+			    struct drm_gem_object **obj)
 {
 	struct msm_drm_private *priv = dev->dev_private;
 	struct msm_gem_object *msm_obj;
···
 	return 0;
 }
 
-struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags)
+struct drm_gem_object *msm_gem_new(struct drm_device *dev, size_t size, uint32_t flags)
 {
 	struct msm_drm_private *priv = dev->dev_private;
 	struct msm_gem_object *msm_obj;
···
 	if (size == 0)
 		return ERR_PTR(-EINVAL);
 
-	ret = msm_gem_new_impl(dev, size, flags, &obj);
+	ret = msm_gem_new_impl(dev, flags, &obj);
 	if (ret)
 		return ERR_PTR(ret);
 
···
 	struct msm_drm_private *priv = dev->dev_private;
 	struct msm_gem_object *msm_obj;
 	struct drm_gem_object *obj;
-	uint32_t size;
-	int ret, npages;
+	size_t size, npages;
+	int ret;
 
 	size = PAGE_ALIGN(dmabuf->size);
 
-	ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj);
+	ret = msm_gem_new_impl(dev, MSM_BO_WC, &obj);
 	if (ret)
 		return ERR_PTR(ret);
 
···
 	return ERR_PTR(ret);
 }
 
-void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, uint32_t flags,
+void *msm_gem_kernel_new(struct drm_device *dev, size_t size, uint32_t flags,
 			 struct drm_gpuvm *vm, struct drm_gem_object **bo,
 			 uint64_t *iova)
 {

drivers/gpu/drm/msm/msm_gem.h

···
 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout);
 int msm_gem_cpu_fini(struct drm_gem_object *obj);
 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
-		uint32_t size, uint32_t flags, uint32_t *handle, char *name);
+		size_t size, uint32_t flags, uint32_t *handle, char *name);
 struct drm_gem_object *msm_gem_new(struct drm_device *dev,
-		uint32_t size, uint32_t flags);
-void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, uint32_t flags,
+		size_t size, uint32_t flags);
+void *msm_gem_kernel_new(struct drm_device *dev, size_t size, uint32_t flags,
 			 struct drm_gpuvm *vm, struct drm_gem_object **bo,
 			 uint64_t *iova);
 void msm_gem_kernel_put(struct drm_gem_object *bo, struct drm_gpuvm *vm);

drivers/gpu/drm/msm/msm_gem_prime.c

···
 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
-	int npages = obj->size >> PAGE_SHIFT;
+	size_t npages = obj->size >> PAGE_SHIFT;
 
 	if (msm_obj->flags & MSM_BO_NO_SHARE)
 		return ERR_PTR(-EINVAL);