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Here we are using drmm to ensure we release the coredump when unloading the module, however the coredump is very much tied to the struct device underneath. We can see this when we hotunplug the device, for which we have already got a coredump attached. In such a case the coredump still remains and adding another is not possible. However we still register the release action via xe_driver_devcoredump_fini(), so in effect two or more releases for one dump. The other consideration is that the coredump state is embedded in the xe_driver instance, so technically once the drmm release action fires we might free the coredumpe state from a different driver instance, assuming we have two release actions and they can race. Rather use devm here to remove the coredump when the device is released. References: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1679 Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Andrzej Hajda <andrzej.hajda@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240522102143.128069-29-matthew.auld@intel.com
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.