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0ee2d97810
Function cxl_port_pick_region_decoder() is called twice, in alloc_region_ref() and cxl_rr_alloc_decoder(). Both functions are subsequently called from cxl_port_attach_region(). Make the decoder a function argument to both which avoids a duplicate call of cxl_port_pick_region_decoder(). Now, cxl_rr_alloc_decoder() no longer allocates the decoder. Instead, the previously picked decoder is assigned to the region reference. Hence, rename the function to cxl_rr_assign_decoder(). Moving the call out of alloc_region_ref() also moves it out of the xa_for_each() loop in there. Now, cxld is determined no longer only for each auto-generated region, but now once for all regions regardless of auto-generated or not. This is fine as the cxld argument is needed for all regions in cxl_rr_assign_decoder() and an error would be returned otherwise anyway. So it is better to determine the decoder in front of all this and fail early if missing instead of running through all that code with multiple calls of cxl_port_pick_region_decoder(). Signed-off-by: Robert Richter <rrichter@amd.com> Reviewed-by: Gregory Price <gourry@gourry.net> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: "Fabio M. De Francesco" <fabio.m.de.francesco@linux.intel.com> Tested-by: Gregory Price <gourry@gourry.net> Acked-by: Dan Williams <dan.j.williams@intel.com> Link: https://patch.msgid.link/20250509150700.2817697-7-rrichter@amd.com Signed-off-by: Dave Jiang <dave.jiang@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.