staging: greybus: remove empty callback function

Remove the optional remove callback for the soc_codec_dev_gbaudio
structure. The only place it is referenced is
snd_soc_component_remove() which is only called if the sound_component
pointer is non-null. The null function pointers here can be optionally
ommitted. When a sound component is registered this way, the remove
callback is optional. We can safely remove the whole gbcodec_remove
function, which used to be an empty function with a void return type.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jaehee Park <jhpark1013@gmail.com>
Link: https://lore.kernel.org/r/12037ae2502ad7d0311bcdf2178c3d2156293236.1649824370.git.jhpark1013@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/greybus/audio_codec.c b/drivers/staging/greybus/audio_codec.c
index 0f50d1e..dc030ca 100644 (file)
--- a/drivers/staging/greybus/audio_codec.c
+++ b/drivers/staging/greybus/audio_codec.c
@@ -1029,12 +1029,6 @@ static int gbcodec_probe(struct snd_soc_component *comp)
        return 0;
 }
 
-static void gbcodec_remove(struct snd_soc_component *comp)
-{
-       /* Empty function for now */
-       return;
-}
-
 static int gbcodec_write(struct snd_soc_component *comp, unsigned int reg,
                         unsigned int value)
 {
@@ -1049,8 +1043,6 @@ static unsigned int gbcodec_read(struct snd_soc_component *comp,
 
 static const struct snd_soc_component_driver soc_codec_dev_gbaudio = {
        .probe  = gbcodec_probe,
-       .remove = gbcodec_remove,
-
        .read = gbcodec_read,
        .write = gbcodec_write,
 };