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net: ethernet: ti: cpsw: don't duplicate ndev_running

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No need to create additional vars to identify if interface is running.
So simplify code by removing redundant var and checking usage counter
instead.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Khoronzhuk 2017-01-19 18:58:25 +02:00 committed by David S. Miller
parent 176b0cbffd
commit 03fd01ad0e
1 changed files with 17 additions and 14 deletions
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31
drivers/net/ethernet/ti/cpsw.c
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@ -357,7 +357,6 @@ struct cpsw_slave {
struct phy_device *phy;
struct net_device *ndev;
u32 port_vlan;
u32 open_stat;
};
static inline u32 slave_read(struct cpsw_slave *slave, u32 offset)
@ -1235,13 +1234,13 @@ static void cpsw_get_ethtool_stats(struct net_device *ndev,
}
}
static int cpsw_common_res_usage_state(struct cpsw_common *cpsw)
static int cpsw_get_usage_count(struct cpsw_common *cpsw)
{
u32 i;
u32 usage_count = 0;
for (i = 0; i < cpsw->data.slaves; i++)
if (cpsw->slaves[i].open_stat)
if (netif_running(cpsw->slaves[i].ndev))
usage_count++;
return usage_count;
@ -1501,8 +1500,11 @@ static int cpsw_ndo_open(struct net_device *ndev)
CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
CPSW_RTL_VERSION(reg));
/* initialize host and slave ports */
if (!cpsw_common_res_usage_state(cpsw))
/* Initialize host and slave ports.
* Given ndev is marked as opened already, so init port only if 1 ndev
* is opened
*/
if (cpsw_get_usage_count(cpsw) < 2)
cpsw_init_host_port(priv);
for_each_slave(priv, cpsw_slave_open, priv);
@ -1513,7 +1515,10 @@ static int cpsw_ndo_open(struct net_device *ndev)
cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan,
ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
if (!cpsw_common_res_usage_state(cpsw)) {
/* Given ndev is marked as opened already, so if more ndev
* are opened - no need to init shared resources.
*/
if (cpsw_get_usage_count(cpsw) < 2) {
/* disable priority elevation */
__raw_writel(0, &cpsw->regs->ptype);
@ -1556,9 +1561,6 @@ static int cpsw_ndo_open(struct net_device *ndev)
cpdma_ctlr_start(cpsw->dma);
cpsw_intr_enable(cpsw);
if (cpsw->data.dual_emac)
cpsw->slaves[priv->emac_port].open_stat = true;
return 0;
err_cleanup:
@ -1578,7 +1580,10 @@ static int cpsw_ndo_stop(struct net_device *ndev)
netif_tx_stop_all_queues(priv->ndev);
netif_carrier_off(priv->ndev);
if (cpsw_common_res_usage_state(cpsw) <= 1) {
/* Given ndev is marked as close already,
* so disable shared resources if no open devices
*/
if (!cpsw_get_usage_count(cpsw)) {
napi_disable(&cpsw->napi_rx);
napi_disable(&cpsw->napi_tx);
cpts_unregister(cpsw->cpts);
@ -1592,8 +1597,6 @@ static int cpsw_ndo_stop(struct net_device *ndev)
cpsw_split_res(ndev);
pm_runtime_put_sync(cpsw->dev);
if (cpsw->data.dual_emac)
cpsw->slaves[priv->emac_port].open_stat = false;
return 0;
}
@ -2418,7 +2421,7 @@ static int cpsw_set_channels(struct net_device *ndev,
netif_dormant_off(slave->ndev);
}
if (cpsw_common_res_usage_state(cpsw)) {
if (cpsw_get_usage_count(cpsw)) {
ret = cpsw_fill_rx_channels(priv);
if (ret)
goto err;
@ -2537,7 +2540,7 @@ static int cpsw_set_ringparam(struct net_device *ndev,
netif_dormant_off(slave->ndev);
}
if (cpsw_common_res_usage_state(cpsw)) {
if (cpsw_get_usage_count(cpsw)) {
cpdma_chan_split_pool(cpsw->dma);
ret = cpsw_fill_rx_channels(priv);