diff --git a/libportability-gfx/src/conv.rs b/libportability-gfx/src/conv.rs
index 13dead8..9cff8f6 100644
--- a/libportability-gfx/src/conv.rs
+++ b/libportability-gfx/src/conv.rs
@@ -18,6 +18,7 @@ pub fn limits_from_hal(limits: Limits) -> VkPhysicalDeviceLimits {
         maxTessellationPatchSize: limits.max_patch_size as _,
         maxPushConstantsSize: 0x80, //TODO
         maxViewports: limits.max_viewports as _,
+        maxViewportDimensions: [limits.max_texture_size as u32; 2],
         maxVertexInputAttributes: limits.max_vertex_input_attributes as _,
         maxVertexInputBindings: limits.max_vertex_input_bindings as _,
         maxVertexInputAttributeOffset: limits.max_vertex_input_attribute_offset as _,
diff --git a/libportability-gfx/src/impls.rs b/libportability-gfx/src/impls.rs
index 95783dd..2f8fd83 100644
--- a/libportability-gfx/src/impls.rs
+++ b/libportability-gfx/src/impls.rs
@@ -1086,6 +1086,7 @@ pub extern "C" fn gfxQueueSubmit(
         };
 
         // only provide the fence for the last submission
+        //TODO: support multiple submissions at gfx-hal level
         let fence = if i + 1 == submits.len() {
             fence.as_ref()
         } else {