From: Codrin Ciubotariu Date: Tue, 20 Aug 2019 16:24:09 +0000 (+0300) Subject: ASoC: mchp-i2s-mcc: Fix unprepare of GCLK X-Git-Tag: v5.2.19~192 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cb00bdfdf4a1c160300ed3c9c897eb91e274f7e2;p=thirdparty%2Fkernel%2Fstable.git ASoC: mchp-i2s-mcc: Fix unprepare of GCLK [ Upstream commit 988b59467b2b14523a266957affbe9eca3e99fc9 ] If hw_free() gets called after hw_params(), GCLK remains prepared, preventing further use of it. This patch fixes this by unpreparing the clock in hw_free() or if hw_params() gets an error. Fixes: 7e0cdf545a55 ("ASoC: mchp-i2s-mcc: add driver for I2SC Multi-Channel Controller") Signed-off-by: Codrin Ciubotariu Link: https://lore.kernel.org/r/20190820162411.24836-2-codrin.ciubotariu@microchip.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- diff --git a/sound/soc/atmel/mchp-i2s-mcc.c b/sound/soc/atmel/mchp-i2s-mcc.c index 8272915fa09b9..ab7d5f98e759e 100644 --- a/sound/soc/atmel/mchp-i2s-mcc.c +++ b/sound/soc/atmel/mchp-i2s-mcc.c @@ -670,8 +670,13 @@ static int mchp_i2s_mcc_hw_params(struct snd_pcm_substream *substream, } ret = regmap_write(dev->regmap, MCHP_I2SMCC_MRA, mra); - if (ret < 0) + if (ret < 0) { + if (dev->gclk_use) { + clk_unprepare(dev->gclk); + dev->gclk_use = 0; + } return ret; + } return regmap_write(dev->regmap, MCHP_I2SMCC_MRB, mrb); } @@ -710,9 +715,13 @@ static int mchp_i2s_mcc_hw_free(struct snd_pcm_substream *substream, regmap_write(dev->regmap, MCHP_I2SMCC_CR, MCHP_I2SMCC_CR_CKDIS); if (dev->gclk_running) { - clk_disable_unprepare(dev->gclk); + clk_disable(dev->gclk); dev->gclk_running = 0; } + if (dev->gclk_use) { + clk_unprepare(dev->gclk); + dev->gclk_use = 0; + } } return 0;