acpi, nfit: collate health state flags

Be tolerant of cases where the BIOS provided NFIT does not consistently
set the flags in all NVDIMM Region Mapping structures associated with a
given dimm.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 2bd842c..1d54833 100644 (file)
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -457,9 +457,9 @@ static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
        INIT_LIST_HEAD(&nfit_memdev->list);
        memcpy(nfit_memdev->memdev, memdev, sizeof(*memdev));
        list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
-       dev_dbg(dev, "%s: memdev handle: %#x spa: %d dcr: %d\n",
+       dev_dbg(dev, "%s: memdev handle: %#x spa: %d dcr: %d flags: %#x\n",
                        __func__, memdev->device_handle, memdev->range_index,
-                       memdev->region_index);
+                       memdev->region_index, memdev->flags);
        return true;
 }
 
@@ -1505,6 +1505,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
        list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
                struct acpi_nfit_flush_address *flush;
                unsigned long flags = 0, cmd_mask;
+               struct nfit_memdev *nfit_memdev;
                u32 device_handle;
                u16 mem_flags;
 
@@ -1518,6 +1519,17 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
                if (nfit_mem->bdw && nfit_mem->memdev_pmem)
                        flags |= NDD_ALIASING;
 
+               /* collate flags across all memdevs for this dimm */
+               list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
+                       struct acpi_nfit_memory_map *dimm_memdev;
+
+                       dimm_memdev = __to_nfit_memdev(nfit_mem);
+                       if (dimm_memdev->device_handle
+                                       != nfit_memdev->memdev->device_handle)
+                               continue;
+                       dimm_memdev->flags |= nfit_memdev->memdev->flags;
+               }
+
                mem_flags = __to_nfit_memdev(nfit_mem)->flags;
                if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED)
                        flags |= NDD_UNARMED;