Fix oops in reconnection logic when no dentry for file being reconnected.

fs/cifs/CHANGES

+Version 0.91
+------------
+Fix oops in reopen_files when invalid dentry. 
+
 Version 0.90
 ------------
-Fix scheduling while atomic error in getting inode info on newly created file. Fix truncate of existing files
-opened with O_CREAT set but O_TRUNC not set.
+Fix scheduling while atomic error in getting inode info on newly created file. 
+Fix truncate of existing files opened with O_CREAT but not O_TRUNC set.
 
 Version 0.89
 ------------

fs/cifs/file.c

@@ -3,7 +3,7 @@
  *
  *   vfs operations that deal with files
  * 
- *   Copyright (c) International Business Machines  Corp., 2002
+ *   Copyright (C) International Business Machines  Corp., 2002,2003
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -225,16 +225,21 @@ int reopen_files(struct cifsTconInfo * pTcon, struct nls_table * nlsinfo)
 			if(file) {                
 				file->private_data = NULL;
 				read_unlock(&GlobalSMBSeslock);
-				rc = cifs_open(file->f_dentry->d_inode,file);
-				read_lock(&GlobalSMBSeslock);
-				if(rc) {
-					cFYI(1,("reconnecting file %s failed with %d",
-						file->f_dentry->d_name.name,rc));
+				if(file->f_dentry == 0) {
+					cFYI(1,("Null dentry for file %p",file));
+					read_lock(&GlobalSMBSeslock);
 				} else {
-					cFYI(1,("reconnection of %s succeeded",
-						file->f_dentry->d_name.name));
-				}
-			} 
+					rc = cifs_open(file->f_dentry->d_inode,file);
+					read_lock(&GlobalSMBSeslock);
+					if(rc) {
+						cFYI(1,("reconnecting file %s failed with %d",
+							file->f_dentry->d_name.name,rc));
+					} else {
+						cFYI(1,("reconnection of %s succeeded",
+							file->f_dentry->d_name.name));
+					}
+				} 
+			}
 		}
 	}
 	read_unlock(&GlobalSMBSeslock);