From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marex@denx.de>
Date: Fri, 2 Aug 2013 12:57:30 +0200
Subject: [U-Boot] [PATCH V3 07/20] usb: gadget: config: fix unaligned
	access issues
In-Reply-To: <1375399657-25642-8-git-send-email-troy.kisky@boundarydevices.com>
References: <1375399657-25642-1-git-send-email-troy.kisky@boundarydevices.com>
	<1375399657-25642-8-git-send-email-troy.kisky@boundarydevices.com>
Message-ID: <201308021257.31155.marex@denx.de>
List-Id: <u-boot.lists.denx.de>
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To: u-boot@lists.denx.de

Dear Troy Kisky,

I don't understand what this patch does and why. It's not very clear from the 
(missing) commit message either.

> Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
> ---
>  drivers/usb/gadget/config.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/gadget/config.c b/drivers/usb/gadget/config.c
> index f563afe..014a679 100644
> --- a/drivers/usb/gadget/config.c
> +++ b/drivers/usb/gadget/config.c
> @@ -10,6 +10,7 @@
>   */
> 
>  #include <common.h>
> +#include <asm/unaligned.h>
>  #include <asm/errno.h>
>  #include <linux/list.h>
>  #include <linux/string.h>
> @@ -86,7 +87,8 @@ int usb_gadget_config_buf(
>  	/* config descriptor first */
>  	if (length < USB_DT_CONFIG_SIZE || !desc)
>  		return -EINVAL;
> -	*cp = *config;
> +	/* config need not be aligned */
> +	memcpy(cp, config, sizeof(*cp));
> 
>  	/* then interface/endpoint/class/vendor/... */
>  	len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8 *)buf,
> @@ -100,7 +102,7 @@ int usb_gadget_config_buf(
>  	/* patch up the config descriptor */
>  	cp->bLength = USB_DT_CONFIG_SIZE;
>  	cp->bDescriptorType = USB_DT_CONFIG;
> -	cp->wTotalLength = cpu_to_le16(len);
> +	put_unaligned_le16(len, &cp->wTotalLength);
>  	cp->bmAttributes |= USB_CONFIG_ATT_ONE;
>  	return len;
>  }

Best regards,
Marek Vasut