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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. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.