Merge tag '6.3-rc7-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Three small smb3 client fixes:

   - two important fixes for unbuffered read regression with the
     iov_iter changes (e.g. read soon after mount in some multichannel
     scenarios)

   - DFS prefix path fix (also for stable)"

* tag '6.3-rc7-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Reapply lost fix from commit 30b2b2196d6e
  cifs: Fix unbuffered read
  cifs: avoid dup prefix path in dfs_get_automount_devname()