From b0fed3140f57c435d2783b698c5090f325c22bad Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Sun, 15 Jul 2007 23:40:12 -0700 Subject: [PATCH] Char: n_hdlc, allow RESTARTSYS retval of tty write Acked-by: Paul Fulghum Signed-off-by: Jiri Slaby Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/n_hdlc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/char/n_hdlc.c b/drivers/char/n_hdlc.c index 37f7d3403040..e8332f305d72 100644 --- a/drivers/char/n_hdlc.c +++ b/drivers/char/n_hdlc.c @@ -400,7 +400,12 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty) /* Send the next block of data to device */ tty->flags |= (1 << TTY_DO_WRITE_WAKEUP); actual = tty->driver->write(tty, tbuf->buf, tbuf->count); - + + /* rollback was possible and has been done */ + if (actual == -ERESTARTSYS) { + n_hdlc->tbuf = tbuf; + break; + } /* if transmit error, throw frame away by */ /* pretending it was accepted by driver */ if (actual < 0) -- 2.20.1