linux-kernel - Re: [PATCH] davinci_emac.c: Fix IFF

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Message-ID: <5265640C.4070201@cogentembedded.com>
Date:	Mon, 21 Oct 2013 21:27:40 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Mariusz Ceier <mceier+kernel@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Mugunthan V N <mugunthanvnm@...com>,
	Lad Prabhakar <prabhakar.csengg@...il.com>,
	Jingoo Han <jg1.han@...sung.com>, Jiri Pirko <jiri@...nulli.us>
CC:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] davinci_emac.c: Fix IFF_ALLMULTI setup

Hello.

On 10/21/2013 08:59 PM, Mariusz Ceier wrote:

> When IFF_ALLMULTI flag is set on interface and IFF_PROMISC isn't,
> emac_dev_mcast_set should only enable RX of multicasts and reset
> MACHASH registers.

> It does this, but afterwards it either sets up multicast MACs
> filtering or disables RX of multicasts and resets MACHASH registers
> again, rendering IFF_ALLMULTI flag useless.

> This patch fixes emac_dev_mcast_set, so that multicast MACs filtering and
> disabling of RX of multicasts are skipped when IFF_ALLMULTI flag is set.

> Tested with kernel 2.6.37.

> Signed-off-by: Mariusz Ceier <mceier+kernel@...il.com>
> ---
>   drivers/net/ethernet/ti/davinci_emac.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

> diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
> index 67df09e..ff3bf0e 100644
> --- a/drivers/net/ethernet/ti/davinci_emac.c
> +++ b/drivers/net/ethernet/ti/davinci_emac.c
> @@ -876,7 +876,7 @@ static void emac_dev_mcast_set(struct net_device *ndev)
>   		    netdev_mc_count(ndev) > EMAC_DEF_MAX_MULTICAST_ADDRESSES) {
>   			mbp_enable = (mbp_enable | EMAC_MBP_RXMCAST);
>   			emac_add_mcast(priv, EMAC_ALL_MULTI_SET, NULL);
> -		}
> +		} else
>   		if (!netdev_mc_empty(ndev)) {

    It should be:

		} else if (!netdev_mc_empty(ndev)) {

WBR, Sergei

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