From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Sat, 17 Nov 2012 15:08:57 +0000 (+0300)
Subject: sound: oss/sb_audio: cap value in sb201_audio_set_speed()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=379170a42c84cee5f95fac536a4b5b76843baf90;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

sound: oss/sb_audio: cap value in sb201_audio_set_speed()

We set "s" before we have capped "speed" so it could be the wrong value.
This could lead to a divide by zero bug.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/oss/sb_audio.c b/sound/oss/sb_audio.c
index b2b3c014221a..048439a16000 100644
--- a/sound/oss/sb_audio.c
+++ b/sound/oss/sb_audio.c
@@ -442,7 +442,7 @@ static int sb201_audio_set_speed(int dev, int speed)
 {
 	sb_devc *devc = audio_devs[dev]->devc;
 	int tmp;
-	int s = speed * devc->channels;
+	int s;
 
 	if (speed > 0)
 	{
@@ -452,6 +452,7 @@ static int sb201_audio_set_speed(int dev, int speed)
 			speed = 44100;
 		if (devc->opened & OPEN_READ && speed > 15000)
 			speed = 15000;
+		s = speed * devc->channels;
 		devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
 		tmp = 256 - devc->tconst;
 		speed = ((1000000 + tmp / 2) / tmp) / devc->channels;