netdev - Re: [PATCH v2 3/4] USBNET: support DMA SG

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Message-ID: <1375694068.4676.1.camel@linux-fkkt.site>
Date:	Mon, 05 Aug 2013 11:14:28 +0200
From:	Oliver Neukum <oneukum@...e.de>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	netdev@...r.kernel.org, linux-usb@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Grant Grundler <grundler@...gle.com>,
	Freddy Xin <freddy@...x.com.tw>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [PATCH v2 3/4] USBNET: support DMA SG

On Mon, 2013-08-05 at 16:47 +0800, Ming Lei wrote:

> @@ -1268,10 +1298,14 @@ netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
>  	entry = (struct skb_data *) skb->cb;
>  	entry->urb = urb;
>  	entry->dev = dev;
> -	entry->length = length;
>  
>  	usb_fill_bulk_urb (urb, dev->udev, dev->out,
>  			skb->data, skb->len, tx_complete, skb);
> +	if (dev->can_dma_sg) {
> +		if (build_dma_sg(skb, urb) < 0)
> +			goto drop;

This is still missing a kfree() for urb->sg in the error case
of usbnet_start_xmit().

	Regards
		Oliver


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