From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Tue, 10 Sep 2013 22:49:20 +0000 (+0800)
Subject: s390/3270: fix return value check in tty3270_resize_work()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8f0ba630af45235a6866054704531d49e524e49a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

s390/3270: fix return value check in tty3270_resize_work()

In case of error, the function tty3270_alloc_screen() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index a0f47c83fd62..3f4ca4e09a4c 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -810,7 +810,7 @@ static void tty3270_resize_work(struct work_struct *work)
 	struct winsize ws;
 
 	screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols);
-	if (!screen)
+	if (IS_ERR(screen))
 		return;
 	/* Switch to new output size */
 	spin_lock_bh(&tp->view.lock);