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cxgb4: Restore L1 cfg, if FW rejects new L1 cfg settings 

In the ethtool set_settings() routine we need to remember our old L1
Configuration in case the firmware rejects the request and then restore
that.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2015-10-21 14:39:52 +05:30 committed by David S. Miller
parent 9bfdad5ef5
commit 4116542897
1 changed files with 11 additions and 4 deletions
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15
drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
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@ -612,6 +612,8 @@ static int set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
struct port_info *p = netdev_priv(dev);
struct link_config *lc = &p->link_cfg;
u32 speed = ethtool_cmd_speed(cmd);
struct link_config old_lc;
int ret;
if (cmd->duplex != DUPLEX_FULL) /* only full-duplex supported */
return -EINVAL;
@ -626,6 +628,7 @@ static int set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
return -EINVAL;
}
old_lc = *lc;
if (cmd->autoneg == AUTONEG_DISABLE) {
cap = speed_to_caps(speed);
@ -642,10 +645,14 @@ static int set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
}
lc->autoneg = cmd->autoneg;
if (netif_running(dev))
return t4_link_l1cfg(p->adapter, p->adapter->pf, p->tx_chan,
lc);
return 0;
/* If the firmware rejects the Link Configuration request, back out
* the changes and report the error.
*/
ret = t4_link_l1cfg(p->adapter, p->adapter->mbox, p->tx_chan, lc);
if (ret)
*lc = old_lc;
return ret;
}
static void get_pauseparam(struct net_device *dev,