Merge with 4.1

1 files changed, 3 insertions, 5 deletions

diff --git a/sql/filesort.cc b/sql/filesort.cc
index b79ea6515c3..ecde74e5ec6 100644
--- a/sql/filesort.cc
+++ b/sql/filesort.cc
@@ -660,10 +660,7 @@ static void make_sortkey(register SORTPARAM *param,
 	    }
 	    uint tmp_length=my_strnxfrm(cs,to,sort_field->length,
 					(unsigned char *) from, length);
-	    if (tmp_length < sort_field->length)
-	      cs->cset->fill(cs, (char*) to+tmp_length,
-			     sort_field->length-tmp_length,
-			     fill_char);
+            DBUG_ASSERT(tmp_length == sort_field->length);
           }
           else
           {
@@ -844,7 +841,8 @@ int merge_many_buff(SORTPARAM *param, uchar *sort_buffer,
     if (flush_io_cache(to_file))
       break;					/* purecov: inspected */
     temp=from_file; from_file=to_file; to_file=temp;
-    
+    setup_io_cache(from_file);
+    setup_io_cache(to_file);
     *maxbuffer= (uint) (lastbuff-buffpek)-1;
   }
   close_cached_file(to_file);			// This holds old result