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ASoC: Intel: bdw_rt286: add checks to avoid static analysis warnings

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snd_soc_card_get_codec_dai() can return NULL, but that value is not
checked for, leading to false-positive static analysis warnings

sound/soc/intel/boards/bdw_rt286.c:190:16: error: dereference of NULL
‘codec_dai’ [CWE-476] [-Werror=analyzer-null-dereference]

  190 |         return snd_soc_component_set_jack(codec_dai->component, NULL, NULL);
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  ‘card_suspend_pre’: event 1
    |
    |  190 |         return snd_soc_component_set_jack(codec_dai->component, NULL, NULL);
    |      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    |      |                |
    |      |                (1) dereference of NULL ‘codec_dai’

This NULL dereference cannot happen, the codec-dai "rt286-aif1" must exists
otherwise the card would not be created. Static analysis cannot know
that however so we might as well squelch this report.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Yaochun Hung <yc.hung@mediatek.com>
Link: https://lore.kernel.org/r/20230731213748.440285-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart
2023-07-31 16:37:46 -05:00
committed by Mark Brown
parent 8cf5286216
commit 64778b022e
1 changed files with 6 additions and 0 deletions
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6
sound/soc/intel/boards/bdw_rt286.c
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@@ -187,6 +187,9 @@ static int card_suspend_pre(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai = snd_soc_card_get_codec_dai(card, "rt286-aif1");
if (!codec_dai)
return 0;
return snd_soc_component_set_jack(codec_dai->component, NULL, NULL);
}
@@ -194,6 +197,9 @@ static int card_resume_post(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai = snd_soc_card_get_codec_dai(card, "rt286-aif1");
if (!codec_dai)
return 0;
return snd_soc_component_set_jack(codec_dai->component, &card_headset, NULL);
}