From 518713ffc88253e0181cb715a3fbad0708cb7ca7 Mon Sep 17 00:00:00 2001
From: Meng Wang <mengw@codeaurora.org>
Date: Mon, 1 Feb 2021 09:59:49 +0800
Subject: [PATCH] asoc: lahaina: add ch_mask check for CPS to avoid endless
 loop

When ch_mask is 0, set_cps_config will enter endless loop. Add
check for ch_mask to avoid such endless loop.

Change-Id: Id2237d4f8070b2edaf3bc9690afa649e82a455f8
Signed-off-by: Meng Wang <mengw@codeaurora.org>
---
 asoc/lahaina.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/asoc/lahaina.c b/asoc/lahaina.c
index a34199b3d374..130df47e1fed 100644
--- a/asoc/lahaina.c
+++ b/asoc/lahaina.c
@@ -5128,6 +5128,11 @@ static void set_cps_config(struct snd_soc_pcm_runtime *rtd,
 		return;
 	}
 
+	if (!ch_mask) {
+		pr_err("%s: channel mask is 0\n", __func__);
+		return;
+	}
+
 	if (!pdata->get_wsa_dev_num) {
 		pr_err("%s: get_wsa_dev_num is NULL\n", __func__);
 		return;