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net: systemport: Fix reception of BPDUs 

SYSTEMPORT has its RXCHK parser block that attempts to validate the
packet structures, unfortunately setting the L2 header check bit will
cause Bridge PDUs (BPDUs) to be incorrectly rejected because they look
like LLC/SNAP packets with a non-IPv4 or non-IPv6 Ethernet Type.

Fixes: 4e8aedfe78c7 ("net: systemport: Turn on offloads by default")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2019-02-15 12:16:51 -08:00 committed by David S. Miller
parent dad8d7c645
commit a40061ea2e
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/broadcom/bcmsysport.c
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@ -134,6 +134,10 @@ static void bcm_sysport_set_rx_csum(struct net_device *dev,
priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
reg = rxchk_readl(priv, RXCHK_CONTROL);
/* Clear L2 header checks, which would prevent BPDUs
* from being received.
*/
reg &= ~RXCHK_L2_HDR_DIS;
if (priv->rx_chk_en)
reg |= RXCHK_EN;
else