From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM

---
 kernel/sound/drivers/mts64.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/sound/drivers/mts64.c b/kernel/sound/drivers/mts64.c
index 9c708b6..2573149 100644
--- a/kernel/sound/drivers/mts64.c
+++ b/kernel/sound/drivers/mts64.c
@@ -816,6 +816,9 @@
 	u8 status, data;
 	struct snd_rawmidi_substream *substream;
 
+	if (!mts)
+		return;
+
 	spin_lock(&mts->lock);
 	ret = mts64_read(mts->pardev->port);
 	data = ret & 0x00ff;

--
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