From 5290759cc4008075fb9333b32b49d74b8b5c3258 Mon Sep 17 00:00:00 2001
From: Joel Fernandes <joelf@ti.com>
Date: Wed, 4 Sep 2013 18:55:14 -0500
Subject: [PATCH] usb: gadget: Fix data aborts during USB ethernet boot
As seen on GCC 4.6 Linaro compiler, control_req buffer is not aligned
on 4 byte boundaray causing data aborts in eth_setup -> conf_buf
during dhcp boot over usb_ether. Fix the issue my aligning control_req
buffer using DEFINE_CACHE_ALIGN_BUFFER.
Tested on am335x_evm platform (beaglebone).
Applies on 2013.10-rc1 branch.
Cc: Tom Rini <trini@ti.com>
Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Joel Fernandes <joelf@ti.com>
---
drivers/usb/gadget/ether.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 579893cbff..700d5fbfb2 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -849,9 +849,10 @@ static struct usb_gadget_strings stringtab = {
};
/*============================================================================*/
-static u8 control_req[USB_BUFSIZ];
+DEFINE_CACHE_ALIGN_BUFFER(u8, control_req, USB_BUFSIZ);
+
#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
-static u8 status_req[STATUS_BYTECOUNT] __attribute__ ((aligned(4)));
+DEFINE_CACHE_ALIGN_BUFFER(u8, status_req, STATUS_BYTECOUNT);
#endif
--
2.39.5