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net: systemport: tell RXCHK if we are using Broadcom tags

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When Broadcom tags are enabled, e.g: when interfaced to an Ethernet
switch, make sure that we tell the RXCHK engine that it should be
expecting a 4-bytes Broadcom tag after the Ethernet MAC Source Address.

Use netdev_uses_dsa() to check for that condition since that will tell
us if a switch is attached to our network interface.

Fixes: 80105befdb ("net: systemport: add Broadcom SYSTEMPORT Ethernet MAC driver")
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 2014-08-28 15:11:03 -07:00 committed by David S. Miller
parent afb84b6261
commit d09d3038a3
1 changed files with 9 additions and 0 deletions
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9
drivers/net/ethernet/broadcom/bcmsysport.c
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@ -139,6 +139,15 @@ static int bcm_sysport_set_rx_csum(struct net_device *dev,
else
reg &= ~RXCHK_SKIP_FCS;
/* If Broadcom tags are enabled (e.g: using a switch), make
* sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
* tag after the Ethernet MAC Source Address.
*/
if (netdev_uses_dsa(dev))
reg |= RXCHK_BRCM_TAG_EN;
else
reg &= ~RXCHK_BRCM_TAG_EN;
rxchk_writel(priv, reg, RXCHK_CONTROL);
return 0;