From: Russell King <[email protected]> Date: Tue, 12 Dec 2017 10:45:36 +0000
> When a PHY has the BMCR_PDOWN bit set, it may decide to ignore writes > to other registers, or reset the registers to power-on defaults. > Micrel PHYs do this for their interrupt registers. > > The current structure of phylib tries to enable interrupts before > resuming (and releasing) the BMCR_PDOWN bit. This fails, causing > Micrel PHYs to stop working after a suspend/resume sequence if they > are using interrupts. > > Fix this by ensuring that the PHY driver resume methods do not take > the phydev->lock mutex themselves, but the callers of phy_resume() > take that lock. This then allows us to move the call to phy_resume() > before we enable interrupts in phy_start(). > > Signed-off-by: Russell King <[email protected]> Applied.
