tree 6fdf15d799b171f51e602cdfb5bcf277aa04338f
parent a64c1a1c755674399da3689499b3f64c2a538120
author Peter Hurley <peter@hurleysoftware.com> 1392137398 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1392314253 -0800

n_tty: Fix poll() when TIME_CHAR and MIN_CHAR == 0

Commit eafbe67f84761d787802e5113d895a316b6292fe,
  n_tty: Refactor input_available_p() by call site
broke poll() when TIME_CHAR(tty) and MIN_CHAR(tty) are both 0.

When TIME_CHAR and MIN_CHAR are both 0, input is available if the
read_cnt is 1 (not 0).

Reported-by: Eric Dumazet <edumazet@google.com>
Tested-by: Eric Dumazet <edumazet@google.com>
Reported-by: Stephane Eranian <eranian@google.com>
Tested-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>