[PATCH] net: usb: asix: make rx_fixup ax_skb buffer aligned

[Sascha Hauer]

On Sun, Nov 22, 2015 at 10:49:27PM +0300, Antony Pavlov wrote:
> ax_skb receive buffer unalignment leads to consequent
> unalignment data access in network stack routines,
> especially in net_checksum().
> 
> By-turn unalignment data accesses lead to performance penalty.
> Moreover on classic MIPS CPUs without hardware unalignment access
> support this leads to undesirable exceptions.
> 
> At the moment barebox on MIPS can't parry these unalignment access
> exceptions, so the Asix USB Ethernet chips, that need receive
> fixup workaround, are completely unusable on MIPS without this patch.
> 
> Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>

Applied, thanks

Sascha

> ---
>  drivers/net/usb/asix.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c
> index 4c53a14..ff80398 100644
> --- a/drivers/net/usb/asix.c
> +++ b/drivers/net/usb/asix.c
> @@ -158,7 +158,7 @@ struct asix_rx_fixup_info {
>  	u16 size;
>  	u16 offset;
>  	bool split_head;
> -	unsigned char ax_skb[RX_FIXUP_SIZE];
> +	unsigned char ax_skb[RX_FIXUP_SIZE] __aligned(2);
>  };
>  
>  struct asix_common_private {
> -- 
> 2.6.2
> 
> 

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