Patch "cxl/acpi: Ensure ports ready at cxl_acpi_probe() return" has been added to the 6.11-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    cxl/acpi: Ensure ports ready at cxl_acpi_probe() return

to the 6.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cxl-acpi-ensure-ports-ready-at-cxl_acpi_probe-return.patch
and it can be found in the queue-6.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 766c3af9a1083669e7f2e58be4cbd65e0c861039
Author: Dan Williams <dan.j.williams@xxxxxxxxx>
Date:   Tue Oct 22 18:43:40 2024 -0700

    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@xxxxxxxxxx [1]
    Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
    Tested-by: Gregory Price <gourry@xxxxxxxxxx>
    Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
    Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
    Link: https://patch.msgid.link/172964781969.81806.17276352414854540808.stgit@xxxxxxxxxxxxxxxxxxxxxxxxx
    Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
index 82b78e331d8ed..432b7cfd12a8e 100644
--- a/drivers/cxl/acpi.c
+++ b/drivers/cxl/acpi.c
@@ -924,6 +924,13 @@ 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_DESCRIPTION("CXL ACPI: Platform Support");
 MODULE_LICENSE("GPL v2");