diff options
| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2022-02-28 05:28:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-15 15:14:45 +0300 |
| commit | ec6f789ac28cdaa751545f8764ebbc3f248c4a99 (patch) | |
| tree | 7fec80747d0e7c07a4d307a79c6939fc1d00f12f | |
| parent | d13f34e1f2194a72038bf2bab17dbc34ee33a685 (diff) | |
| download | linux-ec6f789ac28cdaa751545f8764ebbc3f248c4a99.tar.xz | |
ALSA: spi: Add check for clk_enable()
[ 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>
| -rw-r--r-- | sound/spi/at73c213.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c index 1ef52edeb538..3763f06ed784 100644 --- a/sound/spi/at73c213.c +++ b/sound/spi/at73c213.c @@ -221,7 +221,9 @@ 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; } @@ -787,7 +789,9 @@ 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); @@ -900,7 +904,9 @@ 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) { @@ -1019,7 +1025,9 @@ 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); @@ -1099,9 +1107,16 @@ 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; |