From 5b48a5c2f5526f088187fa341f64368994c9f517 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Wed, 24 Jul 2019 17:37:22 -0400
Subject: Remove packed structs.

These were causing hard faults when trying to deref a borrow,
presumably because of a lack of field alignment.

This does mean structs aren't the correct size (e.g.,
USBConfigurationDescription is 10 bytes instead of 9 on thumb6), so
another solution needs to be fonud for getting data in and out of
structs with a minimum of overhead.
---
 app/src/usb/pipe.rs     |  2 +-
 app/src/usb/usbproto.rs | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/app/src/usb/pipe.rs b/app/src/usb/pipe.rs
index 908c8e5..2efb29b 100644
--- a/app/src/usb/pipe.rs
+++ b/app/src/usb/pipe.rs
@@ -465,7 +465,7 @@ impl PipeDesc {
 }
 
 #[derive(Clone, Copy, Debug)]
-#[repr(C, packed)]
+#[repr(C)]
 // 16 bytes per bank.
 pub(crate) struct BankDesc {
     pub addr: Addr,
diff --git a/app/src/usb/usbproto.rs b/app/src/usb/usbproto.rs
index 9a86ed7..9c1dbcb 100644
--- a/app/src/usb/usbproto.rs
+++ b/app/src/usb/usbproto.rs
@@ -7,7 +7,7 @@
 // documentation.
 
 #[derive(Copy, Clone, Debug, Default)]
-#[repr(C, packed)]
+#[repr(C)]
 pub struct USBDeviceDescriptor {
     pub b_length: u8,
     pub b_descriptor_type: u8,
@@ -26,7 +26,7 @@ pub struct USBDeviceDescriptor {
 }
 
 #[derive(Copy, Clone, Debug, Default)]
-#[repr(C, packed)]
+#[repr(C)]
 pub struct USBConfigurationDescriptor {
     pub b_length: u8,
     pub b_descriptor_type: u8,
@@ -39,7 +39,7 @@ pub struct USBConfigurationDescriptor {
 }
 
 #[derive(Copy, Clone, Debug, Default)]
-#[repr(C, packed)]
+#[repr(C)]
 pub struct USBInterfaceDescriptor {
     pub b_length: u8,
     pub b_descriptor_type: u8,
@@ -53,7 +53,7 @@ pub struct USBInterfaceDescriptor {
 }
 
 #[derive(Copy, Clone, Debug, Default)]
-#[repr(C, packed)]
+#[repr(C)]
 pub struct USBEndpointDescriptor {
     pub b_length: u8,
     pub b_descriptor_type: u8,
@@ -64,7 +64,7 @@ pub struct USBEndpointDescriptor {
 }
 
 #[derive(Copy, Clone, Debug)]
-#[repr(C, packed)]
+#[repr(C)]
 pub struct USBSetupPacket {
     pub bm_request_type: BMRequestType,
     pub b_request: USBRequest,
-- 
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