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2ccbe85456
If the controller is dead, the honest answer to the question whether it has caused an irq is: unknown As the purpose of the irq return is to trigger switching off an IRQ, the correct response if you cannot determine if your device has caused the interrupt is IRQ_HANDLED Signed-off-by: Oliver Neukum <oneukum@suse.com> Link: https://lore.kernel.org/r/20230822112455.18957-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.