| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 042/114] ASoC: ak4613: Enable cache usage to fix crashes on resume | Date | Thu, 8 Nov 2018 13:50:57 -0800 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit dcd2d1f78664fdc75eadaaf65257834e24383d01 ]
During system resume:
kernel BUG at drivers/base/regmap/regcache.c:347! ... PC is at regcache_sync+0x1c/0x128 LR is at ak4613_resume+0x28/0x34
The ak4613 driver is using a regmap cache sync to restore the configuration of the chip on resume but does not actually define a register cache which means that the resume is never going to work and we trigger asserts in regmap. Fix this by enabling caching.
Based on commit d3030d11961a8c10 ("ASoC: ak4642: Enable cache usage to fix crashes on resume") by Mark Brown <broonie@kernel.org>.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- sound/soc/codecs/ak4613.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c index 07a266460ec3..b4b36cc92ffe 100644 --- a/sound/soc/codecs/ak4613.c +++ b/sound/soc/codecs/ak4613.c @@ -143,6 +143,7 @@ static const struct regmap_config ak4613_regmap_cfg = { .max_register = 0x16, .reg_defaults = ak4613_reg, .num_reg_defaults = ARRAY_SIZE(ak4613_reg), + .cache_type = REGCACHE_RBTREE, }; static const struct of_device_id ak4613_of_match[] = { -- 2.17.1
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