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69a83fd3f0
Fix to avoid multiple debug error lines printed on every suspend by Radeon driver's debugfs. radeon_debugfs_init() calls debugfs_create_file() for every ring. This results in printing multiple error lines to the screen and dmesg similar to this: [ 92.378726] debugfs: File 'radeon_ring_gfx' in directory '0000:00:01.0' already present! [ 92.378732] debugfs: File 'radeon_ring_cp1' in directory '0000:00:01.0' already present! [ 92.378734] debugfs: File 'radeon_ring_cp2' in directory '0000:00:01.0' already present! [ 92.378737] debugfs: File 'radeon_ring_dma1' in directory '0000:00:01.0' already present! [ 92.378739] debugfs: File 'radeon_ring_dma2' in directory '0000:00:01.0' already present! [ 92.380775] debugfs: File 'radeon_ring_uvd' in directory '0000:00:01.0' already present! [ 92.406620] debugfs: File 'radeon_ring_vce1' in directory '0000:00:01.0' already present! [ 92.406624] debugfs: File 'radeon_ring_vce2' in directory '0000:00:01.0' already present! Patch v1: The fix was to run lookup() for the file before trying to (re)create that debug file. Patch v2: Call the radeon_debugfs_init() only once when radeon ring is initialized (as suggested by Christian K. - thanks) Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Woody Suwalski <terraluna977@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.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 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.