diff --git a/render/vulkan/pass.c b/render/vulkan/pass.c
index 7ea15684..464cdbc1 100644
--- a/render/vulkan/pass.c
+++ b/render/vulkan/pass.c
@@ -821,14 +821,15 @@ static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
 		goto fail_imageview;
 	}
 
-	void *data;
-	res = vkMapMemory(dev, span.buffer->memory, span.alloc.start, size, 0, &data);
-	if (res != VK_SUCCESS) {
-		wlr_vk_error("vkMapMemory", res);
-		goto fail_imageview;
+	if (!span.buffer->cpu_mapping) {
+		res = vkMapMemory(dev, span.buffer->memory, span.alloc.start, size, 0, &span.buffer->cpu_mapping);
+		if (res != VK_SUCCESS) {
+			wlr_vk_error("vkMapMemory", res);
+			goto fail_imageview;
+		}
 	}
 
-	float *dst = data;
+	float *dst = span.buffer->cpu_mapping;
 	size_t dim_len = lut_3d->dim_len;
 	for (size_t b_index = 0; b_index < dim_len; b_index++) {
 		for (size_t g_index = 0; g_index < dim_len; g_index++) {
@@ -844,8 +845,6 @@ static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
 		}
 	}
 
-	vkUnmapMemory(dev, span.buffer->memory);
-
 	VkCommandBuffer cb = vulkan_record_stage_cb(renderer);
 	vulkan_change_layout(cb, *image,
 		VK_IMAGE_LAYOUT_UNDEFINED, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, 0,