1 files changed, 21 insertions, 9 deletions

diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c
index f744be98cd5a..af0b73802592 100644
--- a/fs/squashfs/cache.c
+++ b/fs/squashfs/cache.c
@@ -70,11 +70,15 @@ struct squashfs_cache_entry *squashfs_cache_get(struct super_block *sb,
         spin_lock(&cache->lock);
 
         while (1) {
-                for (i = 0; i < cache->entries; i++)
-                        if (cache->entry[i].block == block)
+                for (i = cache->curr_blk, n = 0; n < cache->entries; n++) {
+                        if (cache->entry[i].block == block) {
+                                cache->curr_blk = i;
                                 break;
+                        }
+                        i = (i + 1) % cache->entries;
+                }
 
-                if (i == cache->entries) {
+                if (n == cache->entries) {
                         /*
                          * Block not in cache, if all cache entries are used
                          * go to sleep waiting for one to become available.
@@ -245,6 +249,7 @@ struct squashfs_cache *squashfs_cache_init(char *name, int entries,
                 goto cleanup;
         }
 
+        cache->curr_blk = 0;
         cache->next_blk = 0;
         cache->unused = entries;
         cache->entries = entries;
@@ -332,17 +337,20 @@ int squashfs_read_metadata(struct super_block *sb, void *buffer,
                 u64 *block, int *offset, int length)
 {
         struct squashfs_sb_info *msblk = sb->s_fs_info;
-        int bytes, copied = length;
+        int bytes, res = length;
         struct squashfs_cache_entry *entry;
 
         TRACE("Entered squashfs_read_metadata [%llx:%x]\n", *block, *offset);
 
         while (length) {
                 entry = squashfs_cache_get(sb, msblk->block_cache, *block, 0);
-                if (entry->error)
-                        return entry->error;
-                else if (*offset >= entry->length)
-                        return -EIO;
+                if (entry->error) {
+                        res = entry->error;
+                        goto error;
+                } else if (*offset >= entry->length) {
+                        res = -EIO;
+                        goto error;
+                }
 
                 bytes = squashfs_copy_data(buffer, entry, *offset, length);
                 if (buffer)
@@ -358,7 +366,11 @@ int squashfs_read_metadata(struct super_block *sb, void *buffer,
                 squashfs_cache_put(entry);
         }
 
-        return copied;
+        return res;
+
+error:
+        squashfs_cache_put(entry);
+        return res;
 }