From: Jiasheng Jiang jiasheng@iscas.ac.cn
[ Upstream commit ca1697eb09208f0168d94b88b72f57505339cbe5 ]
As the potential failure of the clk_enable(), it should be better to check it and return error if fails.
Fixes: 3568459a5113 ("ALSA: at73c213: manage SSC clock") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Link: https://lore.kernel.org/r/20220228022839.3547266-1-jiasheng@iscas.ac.cn Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- sound/spi/at73c213.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-)
diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c index 76c0e37a838c..8a2da6b1012e 100644 --- a/sound/spi/at73c213.c +++ b/sound/spi/at73c213.c @@ -218,7 +218,9 @@ static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) runtime->hw = snd_at73c213_playback_hw; chip->substream = substream;
- clk_enable(chip->ssc->clk); + err = clk_enable(chip->ssc->clk); + if (err) + return err;
return 0; } @@ -776,7 +778,9 @@ static int snd_at73c213_chip_init(struct snd_at73c213 *chip) goto out;
/* Enable DAC master clock. */ - clk_enable(chip->board->dac_clk); + retval = clk_enable(chip->board->dac_clk); + if (retval) + goto out;
/* Initialize at73c213 on SPI bus. */ retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04); @@ -889,7 +893,9 @@ static int snd_at73c213_dev_init(struct snd_card *card, chip->card = card; chip->irq = -1;
- clk_enable(chip->ssc->clk); + retval = clk_enable(chip->ssc->clk); + if (retval) + return retval;
retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); if (retval) { @@ -1008,7 +1014,9 @@ static int snd_at73c213_remove(struct spi_device *spi) int retval;
/* Stop playback. */ - clk_enable(chip->ssc->clk); + retval = clk_enable(chip->ssc->clk); + if (retval) + goto out; ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); clk_disable(chip->ssc->clk);
@@ -1088,9 +1096,16 @@ static int snd_at73c213_resume(struct device *dev) { struct snd_card *card = dev_get_drvdata(dev); struct snd_at73c213 *chip = card->private_data; + int retval;
- clk_enable(chip->board->dac_clk); - clk_enable(chip->ssc->clk); + retval = clk_enable(chip->board->dac_clk); + if (retval) + return retval; + retval = clk_enable(chip->ssc->clk); + if (retval) { + clk_disable(chip->board->dac_clk); + return retval; + } ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
return 0;