n_tty: Fix poll() when TIME_CHAR and MIN_CHAR == 0
authorPeter Hurley <peter@hurleysoftware.com>
Tue, 11 Feb 2014 16:49:58 +0000 (11:49 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Feb 2014 17:57:33 +0000 (09:57 -0800)
commita5934804a834f525c9e6289935ceef65b952b101
tree6fdf15d799b171f51e602cdfb5bcf277aa04338f
parenta64c1a1c755674399da3689499b3f64c2a538120
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>
drivers/tty/n_tty.c