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net: stmmac: dwmac4: Always update the MAC Hash Filter 

We need to always update the MAC Hash Filter so that previous entries
are invalidated.

Found out while running stmmac selftests.

Fixes: b8ef7020d6 ("net: stmmac: add support for hash table size 128/256 in dwmac4")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2019-09-30 10:19:08 +02:00 committed by David S. Miller
parent 432439fef9
commit f79bfda375
1 changed files with 7 additions and 6 deletions
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13
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
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@ -401,8 +401,11 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
int numhashregs = (hw->multicast_filter_bins >> 5);
int mcbitslog2 = hw->mcast_bits_log2;
unsigned int value;
u32 mc_filter[8];
int i;
memset(mc_filter, 0, sizeof(mc_filter));
value = readl(ioaddr + GMAC_PACKET_FILTER);
value &= ~GMAC_PACKET_FILTER_HMC;
value &= ~GMAC_PACKET_FILTER_HPF;
@ -416,16 +419,13 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
/* Pass all multi */
value |= GMAC_PACKET_FILTER_PM;
/* Set all the bits of the HASH tab */
for (i = 0; i < numhashregs; i++)
writel(0xffffffff, ioaddr + GMAC_HASH_TAB(i));
memset(mc_filter, 0xff, sizeof(mc_filter));
} else if (!netdev_mc_empty(dev)) {
struct netdev_hw_addr *ha;
u32 mc_filter[8];
/* Hash filter for multicast */
value |= GMAC_PACKET_FILTER_HMC;
memset(mc_filter, 0, sizeof(mc_filter));
netdev_for_each_mc_addr(ha, dev) {
/* The upper n bits of the calculated CRC are used to
* index the contents of the hash table. The number of
@ -440,10 +440,11 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
*/
mc_filter[bit_nr >> 5] |= (1 << (bit_nr & 0x1f));
}
for (i = 0; i < numhashregs; i++)
writel(mc_filter[i], ioaddr + GMAC_HASH_TAB(i));
}
for (i = 0; i < numhashregs; i++)
writel(mc_filter[i], ioaddr + GMAC_HASH_TAB(i));
value |= GMAC_PACKET_FILTER_HPF;
/* Handle multiple unicast addresses */