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ASoC: SOF: topology: simplify code to prevent static analysis warnings

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[ Upstream commit 55cb3dc271d81f1982c949a2ac483a6daf613b92 ]

make KCFLAGS='-fanalyzer' sound/soc/sof/intel/ reports a possible NULL
pointer dereference.

sound/soc/sof/topology.c:1136:21: error: dereference of NULL ‘w’
[CWE-476] [-Werror=analyzer-null-dereference]

 1136 |     strcmp(w->sname, rtd->dai_link->stream_name))

The code is rather confusing and can be simplified to make static
analysis happy. No functionality change.

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/20230731213748.440285-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2023-07-31 16:37:43 -05:00 committed by Greg Kroah-Hartman
parent 2ec715bf88
commit d843bcc7ad
1 changed files with 3 additions and 2 deletions
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5
sound/soc/sof/topology.c
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@ -1086,16 +1086,17 @@ static void sof_disconnect_dai_widget(struct snd_soc_component *scomp,
{
struct snd_soc_card *card = scomp->card;
struct snd_soc_pcm_runtime *rtd;
const char *sname = w->sname;
struct snd_soc_dai *cpu_dai;
int i;
if (!w->sname)
if (!sname)
return;
list_for_each_entry(rtd, &card->rtd_list, list) {
/* does stream match DAI link ? */
if (!rtd->dai_link->stream_name ||
strcmp(w->sname, rtd->dai_link->stream_name))
strcmp(sname, rtd->dai_link->stream_name))
continue;
switch (w->id) {