This patch for saphir.c isdn driver for Linux removes one call to
  check_region using request_region instead

  I don't have this hardware so patch is not tested at all (I hope I got
  it right).  This patch removes all references to check_region in this
  driver.

  This is patch number 11 in a series of check_region patches I am doing
  as part of the kernel janitors project.