1 files changed, 17 insertions, 11 deletions

diff --git a/init/do_mounts.c b/init/do_mounts.c
index f8a66424360d..b28ec5819325 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -69,23 +69,28 @@ __setup("ro", readonly);
 __setup("rw", readwrite);
 
 #ifdef CONFIG_BLOCK
+struct uuidcmp {
+        const char *uuid;
+        int len;
+};
+
 /**
  * match_dev_by_uuid - callback for finding a partition using its uuid
  * @dev:        device passed in by the caller
- * @data:       opaque pointer to a 36 byte char array with a UUID
+ * @data:       opaque pointer to the desired struct uuidcmp to match
  *
  * Returns 1 if the device matches, and 0 otherwise.
  */
 static int match_dev_by_uuid(struct device *dev, void *data)
 {
-        u8 *uuid = data;
+        struct uuidcmp *cmp = data;
         struct hd_struct *part = dev_to_part(dev);
 
         if (!part->info)
                 goto no_match;
 
-        if (memcmp(uuid, part->info->uuid, sizeof(part->info->uuid)))
-                        goto no_match;
+        if (strncasecmp(cmp->uuid, part->info->uuid, cmp->len))
+                goto no_match;
 
         return 1;
 no_match:
@@ -95,7 +100,7 @@ no_match:
 
 /**
  * devt_from_partuuid - looks up the dev_t of a partition by its UUID
- * @uuid:       min 36 byte char array containing a hex ascii UUID
+ * @uuid:       char array containing ascii UUID
  *
  * The function will return the first partition which contains a matching
  * UUID value in its partition_meta_info struct.  This does not search
@@ -106,11 +111,11 @@ no_match:
  *
  * Returns the matching dev_t on success or 0 on failure.
  */
-static dev_t devt_from_partuuid(char *uuid_str)
+static dev_t devt_from_partuuid(const char *uuid_str)
 {
         dev_t res = 0;
+        struct uuidcmp cmp;
         struct device *dev = NULL;
-        u8 uuid[16];
         struct gendisk *disk;
         struct hd_struct *part;
         int offset = 0;
@@ -118,6 +123,9 @@ static dev_t devt_from_partuuid(char *uuid_str)
         if (strlen(uuid_str) < 36)
                 goto done;
 
+        cmp.uuid = uuid_str;
+        cmp.len = 36;
+
         /* Check for optional partition number offset attributes. */
         if (uuid_str[36]) {
                 char c = 0;
@@ -134,10 +142,8 @@ static dev_t devt_from_partuuid(char *uuid_str)
                 }
         }
 
-        /* Pack the requested UUID in the expected format. */
-        part_pack_uuid(uuid_str, uuid);
-
-        dev = class_find_device(&block_class, NULL, uuid, &match_dev_by_uuid);
+        dev = class_find_device(&block_class, NULL, &cmp,
+                                &match_dev_by_uuid);
         if (!dev)
                 goto done;