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usb: gadget: Fix data aborts during USB ethernet boot

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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>
This commit is contained in:
Joel Fernandes 2013-09-04 18:55:14 -05:00 committed by Marek Vasut
parent 6b40852da5
commit 5290759cc4
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/gadget/ether.c
View file

@ -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