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ASoC: pcm: Check for ops before deferencing them
Ensure that we always check that an ops structure is present before we try to use it, improving the robustness of the system. Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
parent
a19685cb72
commit
c5914b0aae
1 changed files with 22 additions and 21 deletions
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@ -190,7 +190,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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/* startup the audio subsystem */
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if (cpu_dai->driver->ops->startup) {
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
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ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
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if (ret < 0) {
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dev_err(cpu_dai->dev, "ASoC: can't open interface"
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@ -208,7 +208,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
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}
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}
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if (codec_dai->driver->ops->startup) {
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if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
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ret = codec_dai->driver->ops->startup(substream, codec_dai);
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if (ret < 0) {
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dev_err(codec_dai->dev, "ASoC: can't open codec"
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@ -463,7 +463,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
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}
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}
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if (codec_dai->driver->ops->prepare) {
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if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
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ret = codec_dai->driver->ops->prepare(substream, codec_dai);
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if (ret < 0) {
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dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n",
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@ -472,7 +472,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
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}
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}
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if (cpu_dai->driver->ops->prepare) {
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
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ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
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if (ret < 0) {
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dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
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@ -523,7 +523,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
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}
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}
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if (codec_dai->driver->ops->hw_params) {
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if (codec_dai->driver->ops && codec_dai->driver->ops->hw_params) {
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ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
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if (ret < 0) {
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dev_err(codec_dai->dev, "ASoC: can't set %s hw params:"
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@ -532,7 +532,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
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}
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}
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if (cpu_dai->driver->ops->hw_params) {
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_params) {
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ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
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if (ret < 0) {
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dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n",
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@ -559,11 +559,11 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
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return ret;
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platform_err:
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if (cpu_dai->driver->ops->hw_free)
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
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cpu_dai->driver->ops->hw_free(substream, cpu_dai);
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interface_err:
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if (codec_dai->driver->ops->hw_free)
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if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
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codec_dai->driver->ops->hw_free(substream, codec_dai);
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codec_err:
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@ -600,10 +600,10 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
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platform->driver->ops->hw_free(substream);
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/* now free hw params for the DAIs */
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if (codec_dai->driver->ops->hw_free)
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if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
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codec_dai->driver->ops->hw_free(substream, codec_dai);
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if (cpu_dai->driver->ops->hw_free)
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
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cpu_dai->driver->ops->hw_free(substream, cpu_dai);
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mutex_unlock(&rtd->pcm_mutex);
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@ -618,7 +618,7 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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int ret;
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if (codec_dai->driver->ops->trigger) {
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if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
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ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
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if (ret < 0)
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return ret;
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@ -630,7 +630,7 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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return ret;
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}
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if (cpu_dai->driver->ops->trigger) {
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
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ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
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if (ret < 0)
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return ret;
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@ -647,19 +647,20 @@ static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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int ret;
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if (codec_dai->driver->ops->bespoke_trigger) {
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if (codec_dai->driver->ops &&
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codec_dai->driver->ops->bespoke_trigger) {
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ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
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if (ret < 0)
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return ret;
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}
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if (platform->driver->bespoke_trigger) {
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if (platform->driver->ops && platform->driver->bespoke_trigger) {
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ret = platform->driver->bespoke_trigger(substream, cmd);
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if (ret < 0)
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return ret;
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}
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if (cpu_dai->driver->ops->bespoke_trigger) {
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
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ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
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if (ret < 0)
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return ret;
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@ -684,10 +685,10 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
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if (platform->driver->ops && platform->driver->ops->pointer)
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offset = platform->driver->ops->pointer(substream);
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if (cpu_dai->driver->ops->delay)
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if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
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delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
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if (codec_dai->driver->ops->delay)
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if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
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delay += codec_dai->driver->ops->delay(substream, codec_dai);
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if (platform->driver->delay)
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@ -1673,7 +1674,7 @@ static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_platform *platform = rtd->platform;
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if (platform->driver->ops->ioctl)
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if (platform->driver->ops && platform->driver->ops->ioctl)
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return platform->driver->ops->ioctl(substream, cmd, arg);
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return snd_pcm_lib_ioctl(substream, cmd, arg);
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}
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@ -1934,8 +1935,8 @@ int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
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dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name);
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if (drv->ops->digital_mute && dai->playback_active)
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drv->ops->digital_mute(dai, mute);
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if (drv->ops && drv->ops->digital_mute && dai->playback_active)
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drv->ops->digital_mute(dai, mute);
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}
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return 0;
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@ -2224,7 +2225,7 @@ EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
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int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_platform *platform)
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{
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if (platform->driver->ops->trigger)
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if (platform->driver->ops && platform->driver->ops->trigger)
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return platform->driver->ops->trigger(substream, cmd);
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return 0;
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}
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