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net: ethernet: ti/cpsw: do not crash on single-MAC machines during resume

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During resume, use for_each_slave to walk the slaves of the cpsw, and
soft-reset each of them. This prevents oopses if there is only one
slave configured.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Mack 2013-11-15 08:29:16 +01:00 committed by David S. Miller
parent 82c80e9d9d
commit 1e7a2e219a
1 changed files with 12 additions and 6 deletions
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18
drivers/net/ethernet/ti/cpsw.c
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@ -967,14 +967,19 @@ static inline void cpsw_add_dual_emac_def_ale_entries(
priv->host_port, ALE_VLAN, slave->port_vlan);
}
static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
static void soft_reset_slave(struct cpsw_slave *slave)
{
char name[32];
snprintf(name, sizeof(name), "slave-%d", slave->slave_num);
soft_reset(name, &slave->sliver->soft_reset);
}
static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
u32 slave_port;
sprintf(name, "slave-%d", slave->slave_num);
soft_reset(name, &slave->sliver->soft_reset);
soft_reset_slave(slave);
/* setup priority mapping */
__raw_writel(RX_PRIORITY_MAPPING, &slave->sliver->rx_pri_map);
@ -2171,8 +2176,9 @@ static int cpsw_suspend(struct device *dev)
if (netif_running(ndev))
cpsw_ndo_stop(ndev);
soft_reset("sliver 0", &priv->slaves[0].sliver->soft_reset);
soft_reset("sliver 1", &priv->slaves[1].sliver->soft_reset);
for_each_slave(priv, soft_reset_slave);
pm_runtime_put_sync(&pdev->dev);
/* Select sleep pin state */