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| author | Dan Williams <dan.j.williams@intel.com> | 2024-10-22 18:43:40 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-08 16:28:25 +0100 |
| commit | 8c9a1ec39c698cbc38f4efa9113185f885137f8b (patch) | |
| tree | 65eaa80ec5bfe12dc9fe22f1c2017286fbe39b6e /drivers | |
| parent | a9ed67f39f888bb6e5729112ad45f15d9c5a3ef8 (diff) | |
| download | linux-8c9a1ec39c698cbc38f4efa9113185f885137f8b.tar.gz linux-8c9a1ec39c698cbc38f4efa9113185f885137f8b.tar.bz2 linux-8c9a1ec39c698cbc38f4efa9113185f885137f8b.zip | |
cxl/acpi: Ensure ports ready at cxl_acpi_probe() return
[ Upstream commit 48f62d38a07d464a499fa834638afcfd2b68f852 ]
In order to ensure root CXL ports are enabled upon cxl_acpi_probe()
when the 'cxl_port' driver is built as a module, arrange for the
module to be pre-loaded or built-in.
The "Fixes:" but no "Cc: stable" on this patch reflects that the issue
is merely by inspection since the bug that triggered the discovery of
this potential problem [1] is fixed by other means. However, a stable
backport should do no harm.
Fixes: 8dd2bc0f8e02 ("cxl/mem: Add the cxl_mem driver")
Link: http://lore.kernel.org/20241004212504.1246-1-gourry@gourry.net [1]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Gregory Price <gourry@gourry.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://patch.msgid.link/172964781969.81806.17276352414854540808.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cxl/acpi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index 431953455830..9a881a764cf3 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -768,6 +768,13 @@ static void __exit cxl_acpi_exit(void) /* load before dax_hmem sees 'Soft Reserved' CXL ranges */ subsys_initcall(cxl_acpi_init); + +/* + * Arrange for host-bridge ports to be active synchronous with + * cxl_acpi_probe() exit. + */ +MODULE_SOFTDEP("pre: cxl_port"); + module_exit(cxl_acpi_exit); MODULE_LICENSE("GPL v2"); MODULE_IMPORT_NS(CXL); |