1 files changed, 11 insertions, 6 deletions

diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index 88b9a3ff44e4..eb67edd0f8ea 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -70,7 +70,6 @@ static int bfs_get_block(struct inode *inode, sector_t block,
         struct super_block *sb = inode->i_sb;
         struct bfs_sb_info *info = BFS_SB(sb);
         struct bfs_inode_info *bi = BFS_I(inode);
-        struct buffer_head *sbh = info->si_sbh;
 
         phys = bi->i_sblock + block;
         if (!create) {
@@ -112,7 +111,6 @@ static int bfs_get_block(struct inode *inode, sector_t block,
                 info->si_freeb -= phys - bi->i_eblock;
                 info->si_lf_eblk = bi->i_eblock = phys;
                 mark_inode_dirty(inode);
-                mark_buffer_dirty(sbh);
                 err = 0;
                 goto out;
         }
@@ -147,7 +145,6 @@ static int bfs_get_block(struct inode *inode, sector_t block,
          */
         info->si_freeb -= bi->i_eblock - bi->i_sblock + 1 - inode->i_blocks;
         mark_inode_dirty(inode);
-        mark_buffer_dirty(sbh);
         map_bh(bh_result, sb, phys);
 out:
         mutex_unlock(&info->bfs_lock);
@@ -168,9 +165,17 @@ static int bfs_write_begin(struct file *file, struct address_space *mapping,
                         loff_t pos, unsigned len, unsigned flags,
                         struct page **pagep, void **fsdata)
 {
-        *pagep = NULL;
-        return block_write_begin(file, mapping, pos, len, flags,
-                                        pagep, fsdata, bfs_get_block);
+        int ret;
+
+        ret = block_write_begin(mapping, pos, len, flags, pagep,
+                                bfs_get_block);
+        if (unlikely(ret)) {
+                loff_t isize = mapping->host->i_size;
+                if (pos + len > isize)
+                        vmtruncate(mapping->host, isize);
+        }
+
+        return ret;
 }
 
 static sector_t bfs_bmap(struct address_space *mapping, sector_t block)