From: Awais Belal <awais_belal@mentor.com>
Date: Fri, 17 Feb 2017 07:17:49 +0000 (+0530)
Subject: pcm: extplug: refinement of masks in extplug
X-Git-Tag: v1.1.4~30
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=fbb957138135e09ed9fd0180dcad549aad815465;p=alsa-lib.git

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 a04f826c..1004f542 100644
--- 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);