netdev - Re: [PATCH 1/8] e1000: Convert boolean

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Date:	Tue, 18 Mar 2008 09:41:16 -0700
From:	Joe Perches <joe@...ches.com>
To:	"Kok, Auke" <auke-jan.h.kok@...el.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 1/8] e1000: Convert boolean_t to bool

On Mon, 2008-03-17 at 10:12 -0700, Kok, Auke wrote:
> Joe Perches wrote:
> > On Mon, 2008-03-17 at 09:29 -0700, Auke Kok wrote:
> >> On Thu, 2008-03-06 at 10:07 -0800, Kok, Auke wrote:
> >>> send me a patch for e1000 and for ixgb and I'll happily apply those :)
> > I gather you didn't run the little script to convert
> > the u[_]*int\(8|16|32|64\) to u\1 uses? (u_int8_t -> u8, etc)
> > Did you need or want actual patches to do that?
> I'll take a patch for that and yes, I was too busy to do this myself just now :)

I just sent you a bunch of patches to do this conversion.

I started on doing a kind-of checkpatch/Lindent pass on e1000.

Some of the functions in e1000 are heavily indented
and could be neatened with a little bit of rewrite.

For instance, here's a function in e1000_main.c

It's a little bit hard to understand with the indenting
and breakup of the lines.  I think the rewrite below it
is shorter and easier to read.

Do you want these sorts of changes too?

static int
e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
{
	struct e1000_hw *hw =  &adapter->hw;
	u16 length, offset;

	if (vlan_tx_tag_present(skb)) {
		if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
			( adapter->hw.mng_cookie.status &
			  E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
			return 0;
	}
	if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
		struct ethhdr *eth = (struct ethhdr *) skb->data;
		if ((htons(ETH_P_IP) == eth->h_proto)) {
			const struct iphdr *ip =
				(struct iphdr *)((u8 *)skb->data+14);
			if (IPPROTO_UDP == ip->protocol) {
				struct udphdr *udp =
					(struct udphdr *)((u8 *)ip +
						(ip->ihl << 2));
				if (ntohs(udp->dest) == 67) {
					offset = (u8 *)udp + 8 - skb->data;
					length = skb->len - offset;

					return e1000_mng_write_dhcp_info(hw,
							(u8 *)udp + 8,
							length);
				}
			}
		}
	}
	return 0;
}

could be:

static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
				    struct sk_buff *skb)
{
	struct e1000_hw *hw = &adapter->hw;
	struct ethhdr *eth;
	const struct iphdr *ip;
	struct udphdr *udp;
	u16 length, offset;

	if (vlan_tx_tag_present(skb) &&
	    (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id)
	       && (adapter->hw.mng_cookie.status
		   & E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT))))
		return 0;
	if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
		return 0;
	eth = (struct ethhdr *)skb->data;
	if (eth->h_proto != htons(ETH_P_IP))
		return 0;
	ip = (struct iphdr *)((u8 *)skb->data + 14);
	if (ip->protocol != IPPROTO_UDP)
		return 0;
	udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
	if (ntohs(udp->dest) != 67)
		return 0;

	offset = (u8 *)udp + 8 - skb->data;
	length = skb->len - offset;

	return e1000_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
}

cheers, Joe

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