Resume callback of the PHY driver is called after the one for the MAC driver. The PHY driver resume callback calls phy_init_hw(), and this is potentially problematic if the MAC driver calls phy_start() in its resume callback. One issue was reported with the fec driver and a KSZ8081 PHY which seems to become unstable if a soft reset is triggered during aneg.
The new flag allows MAC drivers to indicate that they take care of suspending/resuming the PHY. Then the MAC PM callbacks can handle any dependency between MAC and PHY PM. Heiner Kallweit (3): net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM net: fec: use mac-managed PHY PM r8169: use mac-managed PHY PM drivers/net/ethernet/freescale/fec_main.c | 3 +++ drivers/net/ethernet/realtek/r8169_main.c | 3 +++ drivers/net/phy/phy_device.c | 6 ++++++ include/linux/phy.h | 2 ++ 4 files changed, 14 insertions(+) -- 2.31.1
