ASoC: compress: Fix compress device direction check

commit a1068045883ed4a18363a4ebad0c3d55e473b716 upstream.

The detection of direction for compress was only taking into account codec
capabilities and not CPU ones. Fix this by checking the CPU side capabilities
as well

Tested-by: Ashish Panwar <ashish.panwar@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 12a9820feac1548d5c3d3cbc50e0a8cc2bfefc25..bb82bb966000afc4ac9a106cc867474fffb5266d 100644 (file)
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -630,6 +630,7 @@ int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
        struct snd_pcm *be_pcm;
        char new_name[64];
        int ret = 0, direction = 0;
+       int playback = 0, capture = 0;
 
        if (rtd->num_codecs > 1) {
                dev_err(rtd->card->dev, "Multicodec not supported for compressed stream\n");
@@ -641,11 +642,27 @@ int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
                        rtd->dai_link->stream_name, codec_dai->name, num);
 
        if (codec_dai->driver->playback.channels_min)
+               playback = 1;
+       if (codec_dai->driver->capture.channels_min)
+               capture = 1;
+
+       capture = capture && cpu_dai->driver->capture.channels_min;
+       playback = playback && cpu_dai->driver->playback.channels_min;
+
+       /*
+        * Compress devices are unidirectional so only one of the directions
+        * should be set, check for that (xor)
+        */
+       if (playback + capture != 1) {
+               dev_err(rtd->card->dev, "Invalid direction for compress P %d, C %d\n",
+                               playback, capture);
+               return -EINVAL;
+       }
+
+       if(playback)
                direction = SND_COMPRESS_PLAYBACK;
-       else if (codec_dai->driver->capture.channels_min)
-               direction = SND_COMPRESS_CAPTURE;
        else
-               return -EINVAL;
+               direction = SND_COMPRESS_CAPTURE;
 
        compr = kzalloc(sizeof(*compr), GFP_KERNEL);
        if (compr == NULL) {