From 8b18cb1c23786de9ce2d8e5682e6592698bc79dc Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Fri, 17 May 2013 20:53:15 +0000
Subject: [PATCH] For ARM, MIPS, and PowerPC, default to 32-byte alignment, but
 allow it to be as small as 8.

---
 sys/dev/usb/usb_freebsd.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/dev/usb/usb_freebsd.h b/sys/dev/usb/usb_freebsd.h
index 870e869e714d..0ae453381454 100644
--- a/sys/dev/usb/usb_freebsd.h
+++ b/sys/dev/usb/usb_freebsd.h
@@ -56,8 +56,12 @@
 #if (!defined(USB_HOST_ALIGN)) || (USB_HOST_ALIGN <= 0)
 /* Use default value. */
 #undef USB_HOST_ALIGN
+#if defined(__arm__) || defined(__mips__) || defined(__powerpc__)
+#define USB_HOST_ALIGN	32		/* Arm and MIPS need at least this much, if not more */
+#else
 #define	USB_HOST_ALIGN    8		/* bytes, must be power of two */
 #endif
+#endif
 /* Sanity check for USB_HOST_ALIGN: Verify power of two. */
 #if ((-USB_HOST_ALIGN) & USB_HOST_ALIGN) != USB_HOST_ALIGN
 #error "USB_HOST_ALIGN is not power of two."