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Thomas Richard (TI.com) 999e9bc953 firmware: ti_sci: Set IO Isolation only if the firmware is capable
Prevent calling ti_sci_cmd_set_io_isolation() on firmware
that does not support the IO_ISOLATION capability. Add the
MSG_FLAG_CAPS_IO_ISOLATION capability flag and check it before
attempting to set IO isolation during suspend/resume operations.

Without this check, systems with older firmware may experience
undefined behavior or errors when entering/exiting suspend states.

Fixes: ec24643bdd ("firmware: ti_sci: Add system suspend and resume call")
Signed-off-by: Thomas Richard (TI.com) <thomas.richard@bootlin.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Link: https://patch.msgid.link/20251031-ti-sci-io-isolation-v2-1-60d826b65949@bootlin.com
Signed-off-by: Nishanth Menon <nm@ti.com>
History 2025-11-03 09:09:02 -06:00
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README

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 reStructuredText 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.