Dan Williams 8f0220af58 Revert "cxl/port: Enable the HDM decoder capability for switch ports" ... commit eb0764b822 ("cxl/port: Enable the HDM decoder capability for switch ports") ...was added on the observation of CXL memory not being accessible after setting up a region on a "cold-plugged" device. A "cold-plugged" CXL device is one that was not present at boot, so platform-firmware/BIOS has no chance to set it up. While it is true that the debug found the enable bit clear in the host-bridge's instance of the global control register (CXL 3.0 8.2.4.19.2 CXL HDM Decoder Global Control Register), that bit is described as: "This bit is only applicable to CXL.mem devices and shall return 0 on CXL Host Bridges and Upstream Switch Ports." So it is meant to be zero, and further testing confirmed that this "fix" had no effect on the failure. Revert it, and be more vigilant about proposed fixes in the future. Since the original copied stable@, flag this revert for stable@ as well. Cc: <stable@vger.kernel.org> Fixes: eb0764b822 ("cxl/port: Enable the HDM decoder capability for switch ports") Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/168685882012.3475336.16733084892658264991.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2023-06-25 14:32:18 -07:00
..
crypto/chacha20-s390	tools/testing/crypto: Use vzalloc instead of vmalloc+memset	2022-07-05 14:46:36 +02:00
cxl	Revert "cxl/port: Enable the HDM decoder capability for switch ports"	2023-06-25 14:32:18 -07:00
fault-injection
ktest	ktest: Restore stty setting at first in dodie	2023-02-20 11:52:27 -05:00
kunit	kunit: tool: Add support for SH under QEMU	2023-04-05 12:51:16 -06:00
memblock	mm, treewide: redefine MAX_ORDER sanely	2023-04-05 19:42:46 -07:00
nvdimm	Driver core changes for 6.4-rc1	2023-04-27 11:53:57 -07:00
radix-tree	maple_tree: add a test case to check maple_alloc	2023-04-18 16:29:56 -07:00
scatterlist	tools/testing/scatterlist: add missing defines	2022-01-30 09:56:58 +02:00
selftests	ARM:	2023-06-04 07:16:53 -04:00
vsock	vsock/test: update expected return values	2023-04-04 12:46:24 +02:00