Hi Joel Fernandes,
On 09/05/2013 07:55 AM, Joel Fernandes wrote:
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 <tr...@ti.com>
Cc: Marek Vasut <ma...@denx.de>
Signed-off-by: Joel Fernandes <jo...@ti.com>
---
v2 changes:
- Using DEFINE_CACHE_ALIGN_BUFFER macro for the alignment.
- Also fixed alignment for status_req.
v3 changes:
- Adjusted commit message for v2 change.
drivers/usb/gadget/ether.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Test on sama5d3xek board with RNDIS gadget, it still has the unaligned
access issue.
However, I test with this patch "usb: gadget: config: fix unaligned
access issues" from: Troy Kisky <troy.ki...@boundarydevices.com> really
fix the unaligned access issue.
more information at: http://patchwork.ozlabs.org/patch/264151/
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 579893c..700d5fb 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
Best Regards,
Bo Shen
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
