[PATCH] ACPI / watchdog: Fix init failure with overlapping register regions

[Ryan Kennedy <ryan5544@gmail.com>]

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>
---
 drivers/acpi/acpi_watchdog.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/acpi_watchdog.c b/drivers/acpi/acpi_watchdog.c
index 8c4e0a1..bf22c29 100644
--- 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;
 			}
-- 
2.9.4