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net: stmmac: only call pmt() during suspend/resume if HW enables PMT

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This is to prepare WOL support with phy. Compared with WOL
implementation which relies on the MAC's PMT features, in phy
supported WOL case, device_may_wakeup() may also be true, but we
should not call mac's pmt() function if HW doesn't enable PMT.

And during resume, we should call phylink_start() if PMT is disabled.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jisheng Zhang 2020-07-27 19:02:48 +08:00 committed by David S. Miller
parent 2f45f7a13e
commit e8377e7a29
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -5085,7 +5085,7 @@ int stmmac_suspend(struct device *dev)
priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv);
/* Enable Power down mode by programming the PMT regs */
if (device_may_wakeup(priv->device)) {
if (device_may_wakeup(priv->device) && priv->plat->pmt) {
stmmac_pmt(priv, priv->hw, priv->wolopts);
priv->irq_wake = 1;
} else {
@ -5157,7 +5157,7 @@ int stmmac_resume(struct device *dev)
* this bit because it can generate problems while resuming
* from another devices (e.g. serial console).
*/
if (device_may_wakeup(priv->device)) {
if (device_may_wakeup(priv->device) && priv->plat->pmt) {
mutex_lock(&priv->lock);
stmmac_pmt(priv, priv->hw, 0);
mutex_unlock(&priv->lock);
@ -5200,7 +5200,7 @@ int stmmac_resume(struct device *dev)
mutex_unlock(&priv->lock);
if (!device_may_wakeup(priv->device)) {
if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
rtnl_lock();
phylink_start(priv->phylink);
rtnl_unlock();