From: Matt Flax <flatmax@flatmax.org>
Date: Wed, 8 May 2019 06:33:13 +0000 (+1000)
Subject: ASoC : cs4265 : readable register too low
X-Git-Tag: v4.4.185~25
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4dcab6232e9fd730ad063735a5c875a2b6b4802;p=thirdparty%2Fkernel%2Fstable.git

ASoC : cs4265 : readable register too low

[ Upstream commit f3df05c805983427319eddc2411a2105ee1757cf ]

The cs4265_readable_register function stopped short of the maximum
register.

An example bug is taken from :
https://github.com/Audio-Injector/Ultra/issues/25

Where alsactl store fails with :
Cannot read control '2,0,0,C Data Buffer,0': Input/output error

This patch fixes the bug by setting the cs4265 to have readable
registers up to the maximum hardware register CS4265_MAX_REGISTER.

Signed-off-by: Matt Flax <flatmax@flatmax.org>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/sound/soc/codecs/cs4265.c b/sound/soc/codecs/cs4265.c
index 93b02be3a90ed..6edec23878611 100644
--- a/sound/soc/codecs/cs4265.c
+++ b/sound/soc/codecs/cs4265.c
@@ -60,7 +60,7 @@ static const struct reg_default cs4265_reg_defaults[] = {
 static bool cs4265_readable_register(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
-	case CS4265_CHIP_ID ... CS4265_SPDIF_CTL2:
+	case CS4265_CHIP_ID ... CS4265_MAX_REGISTER:
 		return true;
 	default:
 		return false;