pcm: extplug: refinement of masks in extplug

It should be possible to use empty mask format with extplug.
The refinement of mask via extplug is now modified,
to accept empty masks as well to work properly.

Signed-off-by: Awais Belal <awais_belal@mentor.com>
Signed-off-by: Mounesh Sutar <sutar.mounesh@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/src/pcm/pcm_extplug.c b/src/pcm/pcm_extplug.c
index a04f826c90a010a75c66d007aa1a7d206c99db5a..1004f5427369a08c20b5518ab6b00056b897d590 100644 (file)
--- a/src/pcm/pcm_extplug.c
+++ b/src/pcm/pcm_extplug.c
@@ -172,6 +172,8 @@ int snd_ext_parm_mask_refine(snd_mask_t *mask, struct snd_ext_parm *parm, int ty
        unsigned int i;
 
        parm += type;
+       if (!parm->active)
+               return 0;
        memset(&bits, 0, sizeof(bits));
        for (i = 0; i < parm->num_list; i++)
                bits.bits[parm->list[i] / 32] |= 1U << (parm->list[i] % 32);