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From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: Mans Rullgard <mans@mansr.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>,
	Maxime Ripard <maxime.ripard@bootlin.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Chen-Yu Tsai <wens@csie.org>, Jose Abreu <joabreu@synopsys.com>,
	Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	"David S. Miller" <davem@davemloft.net>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] net: ethernet: dwmac-sun8i: show message only when switching to promisc
Date: Fri, 18 Oct 2019 16:29:17 +0200	[thread overview]
Message-ID: <20191018142917.GA26078@Red> (raw)
In-Reply-To: <20191018140514.21454-1-mans@mansr.com>

On Fri, Oct 18, 2019 at 03:05:14PM +0100, Mans Rullgard wrote:
> Printing the info message every time more than the max number of mac
> addresses are requested generates unnecessary log spam.  Showing it only
> when the hw is not already in promiscous mode is equally informative
> without being annoying.
> 
> Signed-off-by: Mans Rullgard <mans@mansr.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> index 79c91526f3ec..5be2de1f1179 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> @@ -646,7 +646,8 @@ static void sun8i_dwmac_set_filter(struct mac_device_info *hw,
>  			}
>  		}
>  	} else {
> -		netdev_info(dev, "Too many address, switching to promiscuous\n");
> +		if (readl(ioaddr + EMAC_RX_FRM_FLT) != EMAC_FRM_FLT_RXALL)
> +			netdev_info(dev, "Too many address, switching to promiscuous\n");
>  		v = EMAC_FRM_FLT_RXALL;
>  	}
>  

You need to mask the result, if EMAC_FRM_FLT_MULTICAST | EMAC_FRM_FLT_RXALL is set, you will still print the message.
Or shorter than masking, !(readl(ioaddr + EMAC_RX_FRM_FLT) & EMAC_FRM_FLT_RXALL)

I just realize that perhaps we need to set also IFF_PROMISC in dev->flags.

Thanks
Regards

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: Mans Rullgard <mans@mansr.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	Maxime Ripard <maxime.ripard@bootlin.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Chen-Yu Tsai <wens@csie.org>,
	"David S. Miller" <davem@davemloft.net>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] net: ethernet: dwmac-sun8i: show message only when switching to promisc
Date: Fri, 18 Oct 2019 16:29:17 +0200	[thread overview]
Message-ID: <20191018142917.GA26078@Red> (raw)
In-Reply-To: <20191018140514.21454-1-mans@mansr.com>

On Fri, Oct 18, 2019 at 03:05:14PM +0100, Mans Rullgard wrote:
> Printing the info message every time more than the max number of mac
> addresses are requested generates unnecessary log spam.  Showing it only
> when the hw is not already in promiscous mode is equally informative
> without being annoying.
> 
> Signed-off-by: Mans Rullgard <mans@mansr.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> index 79c91526f3ec..5be2de1f1179 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> @@ -646,7 +646,8 @@ static void sun8i_dwmac_set_filter(struct mac_device_info *hw,
>  			}
>  		}
>  	} else {
> -		netdev_info(dev, "Too many address, switching to promiscuous\n");
> +		if (readl(ioaddr + EMAC_RX_FRM_FLT) != EMAC_FRM_FLT_RXALL)
> +			netdev_info(dev, "Too many address, switching to promiscuous\n");
>  		v = EMAC_FRM_FLT_RXALL;
>  	}
>  

You need to mask the result, if EMAC_FRM_FLT_MULTICAST | EMAC_FRM_FLT_RXALL is set, you will still print the message.
Or shorter than masking, !(readl(ioaddr + EMAC_RX_FRM_FLT) & EMAC_FRM_FLT_RXALL)

I just realize that perhaps we need to set also IFF_PROMISC in dev->flags.

Thanks
Regards

  reply	other threads:[~2019-10-18 14:29 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-18 14:05 [PATCH] net: ethernet: dwmac-sun8i: show message only when switching to promisc Mans Rullgard
2019-10-18 14:05 ` Mans Rullgard
2019-10-18 14:29 ` Corentin Labbe [this message]
2019-10-18 14:29   ` Corentin Labbe

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