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525366b81f
To simplify reasoning about why the DSA framework provides the ds->user_mii_bus functionality, drivers should only use it if they need to. The qca8k driver appears to also use it simply as storage for a pointer, which is not a good enough reason to make the core much more difficult to follow. ds->user_mii_bus is useful for only 2 cases: 1. The driver probes on platform_data (no OF) 2. The driver probes on OF, but there is no OF node for the MDIO bus. It is unclear if case (1) is supported with qca8k. It might not be: the driver might crash when of_device_get_match_data() returns NULL and then it dereferences priv->info without NULL checking. Anyway, let us limit the ds->user_mii_bus usage only to the above cases, and not assign it when an OF node is present. The bus->phy_mask assignment follows along with the movement, because __of_mdiobus_register() overwrites this bus field anyway. The value set by the driver only matters for the non-OF code path. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Alvin Šipraga <alsi@bang-olufsen.dk> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Reviewed-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.