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If the user bypasses i915 and accesses mmio directly, that easily confuses our automatic mmio debugging (any error we then detect is likely to be as a result of the user). Since we expect userspace to open debugfs/i915_forcewake_user if i915.ko is loaded and they want mmio access, that makes the opportune time to disable our debugging for duration of the bypass. v2: Move the fiddling of uncore internals to uncore.c References: https://bugs.freedesktop.org/show_bug.cgi?id=102543 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170907134441.12881-1-chris@chris-wilson.co.uk
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.