linux-kernel - [PATCH 8/9] um: hostaudio: Do not propagate mixer parameter to kernel

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Message-Id: <20241011040441.1586345-9-tiwei.btw@antgroup.com>
Date: Fri, 11 Oct 2024 12:04:40 +0800
From: "Tiwei Bie" <tiwei.btw@...group.com>
To: richard@....at,
	anton.ivanov@...bridgegreys.com,
	johannes@...solutions.net
Cc:  <linux-um@...ts.infradead.org>,
   <linux-kernel@...r.kernel.org>,
  "Tiwei Bie" <tiwei.btw@...group.com>
Subject: [PATCH 8/9] um: hostaudio: Do not propagate mixer parameter to kernel

This parameter is UML specific and is unknown to kernel. It should
not be propagated to kernel, otherwise it will trigger a warning and
be passed to user space as an environment option.

Signed-off-by: Tiwei Bie <tiwei.btw@...group.com>
---
 arch/um/drivers/hostaudio_kern.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 09af903b75ae..0ac149de1ac0 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -57,6 +57,7 @@ __uml_setup("dsp=", set_dsp, "dsp=<dsp device>\n" DSP_HELP);
 
 static int set_mixer(char *name, int *add)
 {
+	*add = 0;
 	mixer = name;
 	return 0;
 }
-- 
2.34.1