linux-kernel - Re: [PATCH net] stmmac: correct mc_filter local variable in set_filter and set_mac

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Message-ID: <543772F9.1010304@st.com>
Date:	Fri, 10 Oct 2014 07:47:37 +0200
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	Vince Bridgers <vbridger@...nsource.altera.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Cc:	<vbridger@...era.com>
Subject: Re: [PATCH net] stmmac: correct mc_filter local variable in set_filter
 and set_mac_addr call

On 10/9/2014 5:10 PM, Vince Bridgers wrote:
> Testing revealed that the local variable mc_filter was dimensioned
> incorrectly for all possible configurations and get_mac_addr should
> have been set_mac_addr (a typo). Make sure mc_filter is dimensioned
> to 8 32-bit unsigned longs - the largest size of the Synopsys
> multicast filter register set.
>
> Signed-off-by: Vince Bridgers <vbridger@...nsource.altera.com>

Acked-by: Giuseppe Cavallaro <peppe.cavallaro@...com>

> ---
>   drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
> index 5efe60e..0adcf73 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
> @@ -134,7 +134,7 @@ static void dwmac1000_set_filter(struct mac_device_info *hw,
>   	void __iomem *ioaddr = (void __iomem *)dev->base_addr;
>   	unsigned int value = 0;
>   	unsigned int perfect_addr_number = hw->unicast_filter_entries;
> -	u32 mc_filter[2];
> +	u32 mc_filter[8];
>   	int mcbitslog2 = hw->mcast_bits_log2;
>
>   	pr_debug("%s: # mcasts %d, # unicast %d\n", __func__,
> @@ -182,7 +182,7 @@ static void dwmac1000_set_filter(struct mac_device_info *hw,
>   		struct netdev_hw_addr *ha;
>
>   		netdev_for_each_uc_addr(ha, dev) {
> -			stmmac_get_mac_addr(ioaddr, ha->addr,
> +			stmmac_set_mac_addr(ioaddr, ha->addr,
>   					    GMAC_ADDR_HIGH(reg),
>   					    GMAC_ADDR_LOW(reg));
>   			reg++;
>

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