udf: Use udf_bread() in udf_load_vat()

Use udf_bread() instead of mapping and loadign buffer head manually in
udf_load_vat().

Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 58a3148..df5287c 100644 (file)
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1176,7 +1176,6 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
        struct udf_part_map *map = &sbi->s_partmaps[p_index];
        struct buffer_head *bh = NULL;
        struct udf_inode_info *vati;
-       uint32_t pos;
        struct virtualAllocationTable20 *vat20;
        sector_t blocks = sb_bdev_nr_blocks(sb);
 
@@ -1198,10 +1197,14 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
        } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
                vati = UDF_I(sbi->s_vat_inode);
                if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
-                       pos = udf_block_map(sbi->s_vat_inode, 0);
-                       bh = sb_bread(sb, pos);
-                       if (!bh)
-                               return -EIO;
+                       int err = 0;
+
+                       bh = udf_bread(sbi->s_vat_inode, 0, 0, &err);
+                       if (!bh) {
+                               if (!err)
+                                       err = -EFSCORRUPTED;
+                               return err;
+                       }
                        vat20 = (struct virtualAllocationTable20 *)bh->b_data;
                } else {
                        vat20 = (struct virtualAllocationTable20 *)