Changeset 5446bee0 in mainline for uspace/srv/fs/fat/fat_ops.c

Timestamp:

2008-04-09T00:58:38Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3d99f68

Parents:

79dbc3e

Message:

BPS read from FAT bootsector is little-endian. It must converted to host
endianity before being used.

File:

• uspace/srv/fs/fat/fat_ops.c (modified) (2 diffs)

uspace/srv/fs/fat/fat_ops.c

@@ -114 +114 @@
         char name[FAT_NAME_LEN + 1 + FAT_EXT_LEN + 1];
         unsigned i, j;
+        unsigned bps;           /* bytes per sector */
         unsigned dps;           /* dentries per sector */
         unsigned blocks;
@@ -119 +120 @@
         block_t *bb;
         block_t *b;
-        fat_bs_t *bs;
 
         bb = block_get(parentp->dev_handle, BS_BLOCK);
         if (!bb)
                 return NULL;
-        bs = (fat_bs_t *)bb->data;
-        dps = bs->bps / sizeof(fat_dentry_t);
-        blocks = parentp->size / bs->bps + (parentp->size % bs->bps != 0);
+        bps = uint16_t_le2host(((fat_bs_t *)bb->data)->bps);
         block_put(bb);
+        dps = bps / sizeof(fat_dentry_t);
+        blocks = parentp->size / bps + (parentp->size % bps != 0);
         for (i = 0; i < blocks; i++) {
                 unsigned dentries;