ASoC: soc-compress: Change the check for codec_dai

It should be better to reverse the check on codec_dai
and returned early in order to be easier to understand.

Fixes: de2c6f98 ("ASoC: soc-compress: prevent the potentially use of null pointer")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220310030041.1556323-1-jiasheng@iscas.ac.cnSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-compress.c

@@ -567,15 +567,18 @@ int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 		return -EINVAL;
 	}
 
+	if (!codec_dai) {
+		dev_err(rtd->card->dev, "Missing codec\n");
+		return -EINVAL;
+	}
+
 	/* check client and interface hw capabilities */
-	if (codec_dai) {
 	if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
 	    snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
 		playback = 1;
 	if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
 	    snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
 		capture = 1;
-	}
 
 	/*
 	 * Compress devices are unidirectional so only one of the directions