linux-kernel - Re: [PATCH] usb driver for intellon based PLC like devolo dlan duo

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Message-Id: <200904171641.33546.oliver@neukum.org>
Date:	Fri, 17 Apr 2009 16:41:32 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	"Peter Holik" <peter@...ik.at>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb driver for intellon based PLC like devolo dlan duo

Am Freitag 17 April 2009 16:10:24 schrieb Peter Holik:

+static int intellon_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+{
+       int len;
+
+       if (unlikely(skb->len < INTELLON_HEADER_SIZE)) {
+               deverr(dev, "unexpected tiny rx frame");
+               return 0;
+       }
+
+       len = (skb->data[skb->len - 2] | (skb->data[skb->len - 1] << 8));

Please use a conversion function.

+       } else {
+               struct sk_buff *skb2;
+
+               skb2 = skb_copy_expand(skb,
+                               INTELLON_HEADER_SIZE,
+                               need_tail,
+                               flags);
+               dev_kfree_skb_any(skb);
+               if (!skb2)
+                       return skb2;

If you return NULL in an error case, write it so explicitely.

+       __skb_push(skb, INTELLON_HEADER_SIZE);
+
+       skb->data[0] = pack_len & 0xFF;
+       skb->data[1] = (pack_len & 0x700) >> 8;

Again, a conversion function is called for.

	Regards
		Oliver

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