linux-kernel - [PATCH AUTOSEL 4.19 09/38] ASoC: wm_adsp: Don't generate kcontrols without READ flags

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Message-Id: <20191030155406.10109-9-sashal@kernel.org>
Date:   Wed, 30 Oct 2019 11:53:37 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Stuart Henderson <stuarth@...nsource.cirrus.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, patches@...nsource.cirrus.com
Subject: [PATCH AUTOSEL 4.19 09/38] ASoC: wm_adsp: Don't generate kcontrols without READ flags

From: Stuart Henderson <stuarth@...nsource.cirrus.com>

[ Upstream commit 3ae7359c0e39f42a96284d6798fc669acff38140 ]

User space always expects to be able to read ALSA controls, so ensure
no kcontrols are generated without an appropriate READ flag. In the case
of a read of such a control zeros will be returned.

Signed-off-by: Stuart Henderson <stuarth@...nsource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
Link: https://lore.kernel.org/r/20191002084240.21589-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/codecs/wm_adsp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index ee85056a85774..b114fc7b2a95e 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -1147,8 +1147,7 @@ static unsigned int wmfw_convert_flags(unsigned int in, unsigned int len)
 	}
 
 	if (in) {
-		if (in & WMFW_CTL_FLAG_READABLE)
-			out |= rd;
+		out |= rd;
 		if (in & WMFW_CTL_FLAG_WRITEABLE)
 			out |= wr;
 		if (in & WMFW_CTL_FLAG_VOLATILE)
-- 
2.20.1