[PATCH v2 1/5] cdev-alias: support referencing diskuuid without child partition

[Ahmad Fatoum]

This is already the case with other cdev aliases, so support this for
symmetry.

Reviewed-by: Sascha Hauer <s.hauer at pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
v1 -> v2:
  - add Sascha's R-b
---
 common/cdev-alias.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/common/cdev-alias.c b/common/cdev-alias.c
index e5a059ad7f4d..1878553615d2 100644
--- a/common/cdev-alias.c
+++ b/common/cdev-alias.c
@@ -57,9 +57,11 @@ static int cdev_alias_resolve_diskuuid(struct cdev_alias_res *cdev_alias_res,
 		if (strcasecmp(cdev->diskuuid, uuid))
 			continue;
 
-		cdev = cdev_find_partition(cdev, arg);
-		if (!cdev)
-			return -ENODEV;
+		if (arg) {
+			cdev = cdev_find_partition(cdev, arg);
+			if (!cdev)
+				return -ENODEV;
+		}
 
 		return fn(cdev, data);
 	}
-- 
2.47.3