[U-Boot] [PATCH v1] usb: Guarantee alignment of the string descriptor

[Bin Meng]

On Thu, Aug 29, 2019 at 10:46 PM Andy Shevchenko
<andriy.shevchenko at linux.intel.com> wrote:
>
> GCC 9.x starts complaining about potential misalignment of the pointer to the
> array (in this case alignment=2) in the packed (alignment=1) structures.
>
> drivers/usb/gadget/composite.c:545:23: warning: taking address of packed member of ‘struct usb_string_descriptor’ may result in an unaligned pointer value [-Waddress-of-packed-member]
>   545 |    collect_langs(sp, s->wData);
>
> drivers/usb/gadget/composite.c:550:24: warning: taking address of packed member of ‘struct usb_string_descriptor’ may result in an unaligned pointer value [-Waddress-of-packed-member]
>   550 |     collect_langs(sp, s->wData);
>
> drivers/usb/gadget/composite.c:555:25: warning: taking address of packed member of ‘struct usb_string_descriptor’ may result in an unaligned pointer value [-Waddress-of-packed-member]
>   555 |      collect_langs(sp, s->wData);
>
> Define structure alignment to be 2 to guarantee alignment of its members.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
> ---
>  include/linux/usb/ch9.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>