cxl: Adjust the startup priority of cxl_pmem to be higher than that of cxl_acpi

During the cxl_acpi probe process, it checks whether the cxl_nvb device
and driver have been attached. Currently, the startup priority of the
cxl_pmem driver is lower than that of the cxl_acpi driver. At this point,
the cxl_nvb driver has not yet been registered on the cxl_bus, causing
the attachment check to fail. This results in a failure to add the root
nvdimm bridge, leading to a cxl_acpi probe failure and ultimately
affecting the subsequent loading of cxl drivers. As a consequence, only
one mem device object exists on the cxl_bus, while the cxl_port device
objects and decoder device objects are missing.

The solution is to raise the startup priority of cxl_pmem to be higher
than that of cxl_acpi, ensuring that the cxl_pmem driver is registered
before the aforementioned attachment check occurs.

Co-developed-by: Wang Yinfeng <[email protected]>
Signed-off-by: Wang Yinfeng <[email protected]>
Signed-off-by: Cui Chao <[email protected]>
Fixes: e7e222a ("cxl: Move devm_cxl_add_nvdimm_bridge() to cxl_pmem.ko")
Reviewed-by: Dan Williams <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Dave Jiang <[email protected]>

Author: Cui Chao

drivers/cxl/pmem.c

@@ -554,7 +554,7 @@ static __exit void cxl_pmem_exit(void)
 
 MODULE_DESCRIPTION("CXL PMEM: Persistent Memory Support");
 MODULE_LICENSE("GPL v2");
-module_init(cxl_pmem_init);
+subsys_initcall(cxl_pmem_init);
 module_exit(cxl_pmem_exit);
 MODULE_IMPORT_NS("CXL");
 MODULE_ALIAS_CXL(CXL_DEVICE_NVDIMM_BRIDGE);