FAT: Find the start of the first partition in a non-hardcoded way

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 0e91556..c6bdb13 100644 (file)
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -145,13 +145,11 @@ fat_register_device(block_dev_desc_t *dev_desc, int part_no)
                        return -1;
                }
 #else
-               /* FIXME we need to determine the start block of the
-                * partition where the DOS FS resides. This can be done
-                * by using the get_partition_info routine. For this
-                * purpose the libpart must be included.
-                */
-               part_offset=63;
-               //part_offset=0;
+               part_offset = buffer[DOS_PART_TBL_OFFSET+8]      |
+                             buffer[DOS_PART_TBL_OFFSET+9] <<8  |
+                             buffer[DOS_PART_TBL_OFFSET+10]<<16 |
+                             buffer[DOS_PART_TBL_OFFSET+11]<<24;
+
                cur_part = 1;
 #endif
        }