ASoC: codecs: hdac_hdmi: Fix incorrect use of list_for_each_entry

[ Upstream commit 326b509238171d37402dbe308e154cc234ed1960 ]

If we don't find any pcm, pcm will point at address at an offset from
the the list head and not a meaningful structure. Fix this by returning
correct pcm if found and NULL if not. Found with coccinelle.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20200415162849.308-1-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 18c173e..78d5b4d 100644 (file)
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -150,14 +150,14 @@ static struct hdac_hdmi_pcm *
 hdac_hdmi_get_pcm_from_cvt(struct hdac_hdmi_priv *hdmi,
                           struct hdac_hdmi_cvt *cvt)
 {
-       struct hdac_hdmi_pcm *pcm = NULL;
+       struct hdac_hdmi_pcm *pcm;
 
        list_for_each_entry(pcm, &hdmi->pcm_list, head) {
                if (pcm->cvt == cvt)
-                       break;
+                       return pcm;
        }
 
-       return pcm;
+       return NULL;
 }
 
 static void hdac_hdmi_jack_report(struct hdac_hdmi_pcm *pcm,