From d843bcc7adc97dec627347cdd823fb0afd7e40cb Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Mon, 31 Jul 2023 16:37:43 -0500 Subject: [PATCH] ASoC: SOF: topology: simplify code to prevent static analysis warnings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ 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 Reviewed-by: Rander Wang Reviewed-by: Daniel Baluta Reviewed-by: Yaochun Hung Link: https://lore.kernel.org/r/20230731213748.440285-4-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/sof/topology.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index 872e44408298f..e7305ce57ea1f 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -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) {