On 2/11/14, 9:49 AM, Peter Hurley wrote:
From: Peter Hurley <pe...@hurleysoftware.com> Date: Tue, 11 Feb 2014 10:10:07 -0500 Subject: [PATCH] n_tty: Fix poll() when TIME_CHAR and MIN_CHAR == 0Commit 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: Stephane Eranian <eran...@google.com> Signed-off-by: Peter Hurley <pe...@hurleysoftware.com> --- drivers/tty/n_tty.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index cb8017a..2747a3b 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1896,7 +1896,7 @@ err: static inline int input_available_p(struct tty_struct *tty, int poll) { struct n_tty_data *ldata = tty->disc_data; - int amt = poll && !TIME_CHAR(tty) ? MIN_CHAR(tty) : 1; + int amt = poll && !TIME_CHAR(tty) && MIN_CHAR(tty) ? MIN_CHAR(tty) : 1; if (ldata->icanon && !L_EXTPROC(tty)) { if (ldata->canon_head != ldata->read_tail)
Worked for me. Tested-by: David Ahern <dsah...@gmail.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
