netdev - Re: ZD1211RW unaligned accesses...

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Date:	Sat, 24 Nov 2007 17:52:01 +0100
From:	Ulrich Kunitz <kune@...ne-taler.de>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	Shaddy Baddah <shaddy_baddah@...mail.com>,
	David Miller <davem@...emloft.net>
Subject: Re: ZD1211RW unaligned accesses...

Herbert Xu wrote:

> So please try the following patch (instead of the original one)
> which should fix all the unailgned accesses in do_rx.
> 
> Cheers,
> -- 
> Visit Openswan at http://www.openswan.org/
> Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
> --
> diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
> index a903645..d06b05b 100644
> --- a/drivers/net/wireless/zd1211rw/zd_mac.c
> +++ b/drivers/net/wireless/zd1211rw/zd_mac.c
> @@ -1166,15 +1166,16 @@ static void do_rx(unsigned long mac_ptr)
>  int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
>  {
>  	struct sk_buff *skb;
> +	unsigned int hlen = ALIGN(sizeof(struct zd_rt_hdr), 16);
>  
> -	skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
> +	skb = dev_alloc_skb(hlen + length);
>  	if (!skb) {
>  		struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
>  		dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
>  		ieee->stats.rx_dropped++;
>  		return -ENOMEM;
>  	}
> -	skb_reserve(skb, sizeof(struct zd_rt_hdr));
> +	skb_reserve(skb, hlen - ZD_PLCP_HEADER_SIZE);
>  	memcpy(__skb_put(skb, length), buffer, length);
>  	skb_queue_tail(&mac->rx_queue, skb);
>  	tasklet_schedule(&mac->rx_tasklet);

ACK. This patch should solve it and is better than my patch.

-- 
Uli Kunitz
-
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