catpt: Switch to use list_entry_is_head() helper

Since we got list_entry_is_head() helper in the generic header,
we may switch catpt to use it. It removes the need in additional variable.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20201214172138.44267-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/catpt/pcm.c b/sound/soc/intel/catpt/pcm.c
index e5d54bb..9d304b3 100644 (file)
--- a/sound/soc/intel/catpt/pcm.c
+++ b/sound/soc/intel/catpt/pcm.c
@@ -331,7 +331,7 @@ static int catpt_dai_apply_usettings(struct snd_soc_dai *dai,
 {
        struct catpt_dev *cdev = dev_get_drvdata(dai->dev);
        struct snd_soc_component *component = dai->component;
-       struct snd_kcontrol *pos, *kctl = NULL;
+       struct snd_kcontrol *pos;
        const char *name;
        int ret;
        u32 id = stream->info.stream_hw_id;
@@ -356,17 +356,15 @@ static int catpt_dai_apply_usettings(struct snd_soc_dai *dai,
 
        list_for_each_entry(pos, &component->card->snd_card->controls, list) {
                if (pos->private_data == component &&
-                   !strncmp(name, pos->id.name, sizeof(pos->id.name))) {
-                       kctl = pos;
+                   !strncmp(name, pos->id.name, sizeof(pos->id.name)))
                        break;
-               }
        }
-       if (!kctl)
+       if (list_entry_is_head(pos, &component->card->snd_card->controls, list))
                return -ENOENT;
 
        if (stream->template->type != CATPT_STRM_TYPE_LOOPBACK)
-               return catpt_set_dspvol(cdev, id, (long *)kctl->private_value);
-       ret = catpt_ipc_mute_loopback(cdev, id, *(bool *)kctl->private_value);
+               return catpt_set_dspvol(cdev, id, (long *)pos->private_value);
+       ret = catpt_ipc_mute_loopback(cdev, id, *(bool *)pos->private_value);
        if (ret)
                return CATPT_IPC_ERROR(ret);
        return 0;