2019-10-19 08:27:42

by Måns Rullgård

Subject: [PATCH] net: ethernet: dwmac-sun8i: show message only when switching to promisc

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 <[email protected]>
---
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;
}

--
2.23.0

2019-10-19 08:31:10

by Corentin Labbe

Subject: Re: [PATCH] net: ethernet: dwmac-sun8i: show message only when switching to promisc

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 <[email protected]>
> ---
> 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