NTFS: Fix a bug in fs/ntfs/index.c::ntfs_index_lookup(). When the returned

index entry is in the index root, we forgot to set the @ir pointer in
      the index context.  Thanks for Yura Pakhuchiy for finding this bug.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

fs/ntfs/ChangeLog

@@ -55,6 +55,9 @@ ToDo/Notes:
 	  length is zero.
 	- Add runlist.[hc]::ntfs_rl_punch_nolock() which punches a caller
 	  specified hole into a runlist.
+	- Fix a bug in fs/ntfs/index.c::ntfs_index_lookup().  When the returned
+	  index entry is in the index root, we forgot to set the @ir pointer in
+	  the index context.  Thanks to Yura Pakhuchiy for finding this bug.
 
 2.1.23 - Implement extension of resident files and make writing safe as well as
 	 many bug fixes, cleanups, and enhancements...

fs/ntfs/index.c

@@ -205,6 +205,7 @@ int ntfs_index_lookup(const void *key, const int key_len,
 				&ie->key, key_len)) {
 ir_done:
 			ictx->is_in_root = TRUE;
+			ictx->ir = ir;
 			ictx->actx = actx;
 			ictx->base_ni = base_ni;
 			ictx->ia = NULL;