From 0d51a9cbb6c1275cc0f3840c36f8b7840a438c59 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Thu, 6 Jan 2011 16:04:57 +0000 Subject: [PATCH] ASoC: Taint the kernel if debugfs is used to write directly to CODECs Since direct register writes may confuse the drivers and are supposed to be used only in diagnostic situations discourage their use in production by tainting the kernel when we do a write. Signed-off-by: Mark Brown Acked-by: Liam Girdwood --- sound/soc/soc-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index bac7291b6ff6..96bf381683f7 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -209,6 +209,10 @@ static ssize_t codec_reg_write_file(struct file *file, start++; if (strict_strtoul(start, 16, &value)) return -EINVAL; + + /* Userspace has been fiddling around behind the kernel's back */ + add_taint(TAINT_USER); + snd_soc_write(codec, reg, value); return buf_size; } -- 2.20.1