FAT: handle the cluster number being 1

Any reference to cluster 1 is an error, so treat it the same as
cluster 0 or one of the EOF cluster numbers.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/core/fs/fat/fat.c b/core/fs/fat/fat.c
index ce3cae6..21dda90 100644 (file)
--- a/core/fs/fat/fat.c
+++ b/core/fs/fat/fat.c
@@ -128,7 +128,7 @@ static sector_t get_next_sector(struct fs_info* fs, uint32_t sector)
     
     /* get a new cluster */
     cluster = get_next_cluster(fs, (data_sector >> FAT_SB(fs)->clust_shift) + 2);
-    if (!cluster ) 
+    if (cluster < 2) 
        return 0;
     
     /* return the start of the new cluster */