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The cross-chip notifiers work by comparing each ds->index against the info->sw_index value from the notifier. The ds->index is retrieved from the device tree dsa,member property. If a single tree cross-chip topology does not declare unique switch IDs, this will result in hard-to-debug issues/voodoo effects such as the cross-chip notifier for one switch port also matching the port with the same number from another switch. Check in dsa_switch_parse_member_of() whether the DSA switch tree contains a DSA switch with the index we're preparing to add, before actually adding it. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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.