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authorPeter Hurley <peter@hurleysoftware.com>2016-01-10 20:36:12 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-01-28 14:13:44 -0800
commitf33798deecbd59a2955f40ac0ae2bc7dff54c069 (patch)
treec1d3337afd9fb69e8ab19c70a5ddab33f0fa06d9 /include/linux/tty.h
parent2d73b069f816742ba607f65f9dbbff2885365951 (diff)
tty: Fix GPF in flush_to_ldisc(), part 2
commit 9ce119f318ba ("tty: Fix GPF in flush_to_ldisc()") fixed a GPF caused by a line discipline which does not define a receive_buf() method. However, the vt driver (and speakup driver also) pushes selection data directly to the line discipline receive_buf() method via tty_ldisc_receive_buf(). Fix the same problem in tty_ldisc_receive_buf(). Cc: <stable@vger.kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty.h')
-rw-r--r--include/linux/tty.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index dea7d54d00d4..03e4015fa033 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -579,7 +579,7 @@ static inline int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
count = ld->ops->receive_buf2(ld->tty, p, f, count);
else {
count = min_t(int, count, ld->tty->receive_room);
- if (count)
+ if (count && ld->ops->receive_buf)
ld->ops->receive_buf(ld->tty, p, f, count);
}
return count;