ACPI / watchdog: Fix init failure with overlapping register regions

Partially overlapping regions cause platform device creation
to fail. The latter of two overlapping resources will fail to be
reserved. Fix this by merging overlapping resource ranges while
enumerating WDAT table entries.

Signed-off-by: Ryan Kennedy <ryan5544@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpi_watchdog.c b/drivers/acpi/acpi_watchdog.c
index 8c4e0a18460a78df600067da69537e6256d6bc1c..bf22c29d25179e937523c026c8028f644f3379f6 100644 (file)
--- a/drivers/acpi/acpi_watchdog.c
+++ b/drivers/acpi/acpi_watchdog.c
@@ -86,7 +86,12 @@ void __init acpi_watchdog_init(void)
 
                found = false;
                resource_list_for_each_entry(rentry, &resource_list) {
-                       if (resource_contains(rentry->res, &res)) {
+                       if (rentry->res->flags == res.flags &&
+                           resource_overlaps(rentry->res, &res)) {
+                               if (res.start < rentry->res->start)
+                                       rentry->res->start = res.start;
+                               if (res.end > rentry->res->end)
+                                       rentry->res->end = res.end;
                                found = true;
                                break;
                        }