netdev - Re: [PATCH net-next v3 1/1] net: fec: Enable imx6 enet checksum acceleration.

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Message-ID: <20130418215408.GA8944@electric-eye.fr.zoreil.com>
Date:	Thu, 18 Apr 2013 23:54:08 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Jim Baxter <jim_baxter@...tor.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Frank Li <Frank.Li@...escale.com>,
	Fugang Duan <B38611@...escale.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v3 1/1] net: fec: Enable imx6 enet checksum
 acceleration.

Jim Baxter <jim_baxter@...tor.com> :
[...]
> What you mean by remove the "restart_required" variable, I only want a
> restart in certain situations? Am I misunderstanding you comment?

	bool b = false;

	if (pouet) {
		b = true;
		foo();
	}

	if (b)
		bar();

can be rewritten as

	if (pouet) {
		foo();
		bar();
	}
	
i.e. your code can be reformulated as:

static int fec_set_features(struct net_device *netdev,
	netdev_features_t features)
{
	struct fec_enet_private *fep = netdev_priv(netdev);
	netdev_features_t changed = features ^ netdev->features;

	netdev->features = features;

	/* Receive checksum has been changed */
	if (changed & NETIF_F_RXCSUM) {
		if (features & NETIF_F_RXCSUM)
			fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
		else
			fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED;

		if (netif_running(netdev)) {
			fec_stop(netdev);
			fec_restart(netdev, fep->phy_dev->duplex);
			netif_wake_queue(netdev);
		} else {
			fec_restart(netdev, fep->phy_dev->duplex);
		}
	}

	return 0;
}

-- 
Ueimor
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