ASoC: Return -1 instead of -EINVAL to ensure consistency

The code can't really cope with I/O errors, so it would be better
to be consistent throughout all cache functions and return -1 instead
of -EINVAL.

The return value of snd_soc_read(...) is mostly checked in the probe
function and nowhere else.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 28bf1ff980ce9cc57b1178cfae824e751c0f18c3..6702a3dcd3fe84ae2af02f838d86468a4a2cefa6 100644 (file)
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -228,7 +228,7 @@ static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec,
        if (reg >= codec->driver->reg_cache_size ||
            snd_soc_codec_volatile_register(codec, reg)) {
                if (codec->cache_only)
-                       return -EINVAL;
+                       return -1;
 
                return codec->hw_read(codec, reg);
        } else {
@@ -455,7 +455,7 @@ static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec,
        if (reg >= codec->driver->reg_cache_size ||
            snd_soc_codec_volatile_register(codec, reg)) {
                if (codec->cache_only)
-                       return -EINVAL;
+                       return -1;
 
                return codec->hw_read(codec, reg);
        }