[PATCH net-next] net: mvneta: fix failed to suspend if WOL is enabled

[David Miller]

From: Jisheng Zhang <jszhang at marvell.com>
Date: Fri, 14 Apr 2017 19:07:32 +0800

> Recently, suspend/resume and WOL support are added into mvneta driver.
> If we enable WOL, then we get some error as below on Marvell BG4CT
> platforms during suspend:
> 
> [  184.149723] dpm_run_callback(): mdio_bus_suspend+0x0/0x50 returns -16
> [  184.149727] PM: Device f7b62004.mdio-mi:00 failed to suspend: error -16
> 
> -16 means -EBUSY, phy_suspend() will return -EBUSY if it finds the
> device has WOL enabled.
> 
> We fix this issue by properly setting the netdev's power.can_wakeup
> and power.wakeup, i.e
> 
> 1. in mvneta_mdio_probe(), call device_set_wakeup_capable() to set
> power.can_wakeup if the phy support WOL.
> 
> 2. in mvneta_ethtool_set_wol(), call device_set_wakeup_enable() to
> set power.wakeup if WOL has been successfully enabled in phy.
> 
> Signed-off-by: Jisheng Zhang <jszhang at marvell.com>

Applied.