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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2018-05-14 07:09:51 +0900
committerTakashi Iwai <tiwai@suse.de>2018-05-14 17:47:48 +0200
commit841bdb7c0bde0fb2068c64a09bb89a06be63c4d6 (patch)
tree34b59394c2285149f679b9519195f6e8452fc403 /sound/core
parente6f32bf48fb1d3b7aedc0deb6e791362af71cb17 (diff)
downloadlinux-841bdb7c0bde0fb2068c64a09bb89a06be63c4d6.tar.bz2
ALSA: vmaster: use position offset macro of TLV data
A series of SNDRV_CTL_TLVO_XXX macro was introduced for position offset of TLV data. This commit applies a code optimization. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/vmaster.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c
index 9e96186742d0..58fa3f94722a 100644
--- a/sound/core/vmaster.c
+++ b/sound/core/vmaster.c
@@ -421,13 +421,15 @@ struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
kctl->private_free = master_free;
/* additional (constant) TLV read */
- if (tlv &&
- (tlv[0] == SNDRV_CTL_TLVT_DB_SCALE ||
- tlv[0] == SNDRV_CTL_TLVT_DB_MINMAX ||
- tlv[0] == SNDRV_CTL_TLVT_DB_MINMAX_MUTE)) {
- kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
- memcpy(master->tlv, tlv, sizeof(master->tlv));
- kctl->tlv.p = master->tlv;
+ if (tlv) {
+ unsigned int type = tlv[SNDRV_CTL_TLVO_TYPE];
+ if (type == SNDRV_CTL_TLVT_DB_SCALE ||
+ type == SNDRV_CTL_TLVT_DB_MINMAX ||
+ type == SNDRV_CTL_TLVT_DB_MINMAX_MUTE) {
+ kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
+ memcpy(master->tlv, tlv, sizeof(master->tlv));
+ kctl->tlv.p = master->tlv;
+ }
}
return kctl;