[GFS2] Fix write alloc required shortcut calculation

The comparison was being made against the wrong quantity.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 4356cc2fb3f5..e4effc47abfc 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1222,10 +1222,10 @@ int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
                 do_div(lblock_stop, bsize);
         } else {
                 unsigned int shift = sdp->sd_sb.sb_bsize_shift;
+                u64 end_of_file = (ip->i_di.di_size + sdp->sd_sb.sb_bsize - 1) >> shift;
                 lblock = offset >> shift;
                 lblock_stop = (offset + len + sdp->sd_sb.sb_bsize - 1) >> shift;
-                if (lblock_stop > ip->i_di.di_blocks) { /* writing past the
-                                                           last block */
+                if (lblock_stop > end_of_file) {
                         *alloc_required = 1;
                         return 0;
                 }