diff options
| -rw-r--r-- | firmware/drivers/fat.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/firmware/drivers/fat.c b/firmware/drivers/fat.c index 92ac2a3bf8..099417baca 100644 --- a/firmware/drivers/fat.c +++ b/firmware/drivers/fat.c @@ -546,10 +546,17 @@ static void *cache_fat_sector(int fatsector) static unsigned int find_free_cluster(unsigned int startcluster) { - unsigned int sector = startcluster / CLUSTERS_PER_FAT_SECTOR; - unsigned int offset = startcluster % CLUSTERS_PER_FAT_SECTOR; + unsigned int sector; + unsigned int offset; unsigned int i; + /* Cluster 0 and 1 are reserved */ + if(startcluster < 2) + startcluster = 2; + + sector = startcluster / CLUSTERS_PER_FAT_SECTOR; + offset = startcluster % CLUSTERS_PER_FAT_SECTOR; + for (i = 0; i<fat_bpb.fatsize; i++) { unsigned int j; unsigned int nr = (i + sector) % fat_bpb.fatsize; |