From: Michal Ostrowski <mostrows@watson.ibm.com>
Date: Fri, 15 Jul 2005 10:56:33 +0000 (-0700)
Subject: [PATCH] rocket.c: Fix ldisc ref count handling
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a1287ba1ba810aae1f8b81e32560d5d3bf3ff9f0;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] rocket.c: Fix ldisc ref count handling

If bailing out because there is nothing to receive in rp_do_receive(),
tty_ldisc_deref is not called.  Failure to do so increases the ref count
and causes release_dev() to hang since it can't get the ref count to 0.

Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index f463d6baa685..5b1d3680c8ab 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -355,7 +355,7 @@ static void rp_do_receive(struct r_port *info,
 		ToRecv = space;
 
 	if (ToRecv <= 0)
-		return;
+		goto done;
 
 	/*
 	 * if status indicates there are errored characters in the
@@ -437,6 +437,7 @@ static void rp_do_receive(struct r_port *info,
 	}
 	/*  Push the data up to the tty layer */
 	ld->receive_buf(tty, tty->flip.char_buf, tty->flip.flag_buf, count);
+done:
 	tty_ldisc_deref(ld);
 }