From: Daniel Mack <daniel@zonque.org>
Date: Tue, 7 Oct 2014 12:25:13 +0000 (+0200)
Subject: ALSA: usb: caiaq: check for cdev->n_streams > 1
X-Git-Tag: v3.18-rc1~5^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=897c329bcb2206dd025cdb7ba84831a4f3c872d0;p=platform%2Fkernel%2Flinux-exynos.git

ALSA: usb: caiaq: check for cdev->n_streams > 1

Coverity spotted a possible DIV0 condition when cdev->n_streams is 0.

Fix this by making sure the value is > 1 in snd_usb_caiaq_audio_init().

Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index 7103b09..2728447 100644
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -816,6 +816,11 @@ int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
 		return -EINVAL;
 	}
 
+	if (cdev->n_streams < 2) {
+		dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
+		return -EINVAL;
+	}
+
 	ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
 			cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);