Merge branch 'net-make-phy-pm-ops-a-no-op-if-mac-driver-manages-phy-pm'

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Heiner Kallweit says:

====================
net: make PHY PM ops a no-op if MAC driver manages PHY PM

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.
====================

Link: https://lore.kernel.org/r/9e695411-ab1d-34fe-8b90-3e8192ab84f6@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Jakub Kicinski 2021-04-09 16:37:08 -07:00

parent a7150e3822 5c2280fc2e

commit 6597b5c21c

4 changed files with 14 additions and 0 deletions

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3

drivers/net/ethernet/freescale/fec_main.c

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3

drivers/net/ethernet/realtek/r8169_main.c

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6

drivers/net/phy/phy_device.c

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2

include/linux/phy.h

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