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Mikko Perttunen 5a8d95d20c gpu: host1x: Assign intr waiter inside lock
Move the assignment of the ref out-pointer in host1x_intr_add_action
to happen within the spinlock. With the current arrangement,
it is possible for the waiter to complete before the assignment
has happened, which breaks horribly if the waiter completion
callback tries to use the reference.

In practice, there is currently no situation where this issue can
manifest -- it was first noticed with the upcoming DMA fence
implementation patches. As such this doesn't need to be backported.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
History 2021-03-31 17:42:14 +02:00
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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.