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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2017-02-22 07:54:47 +0900
committerTakashi Iwai <tiwai@suse.de>2017-02-22 07:12:23 +0100
commit89b593c30e83ee19b7e7c6c7d6092669bebf343e (patch)
tree64c4160ed7b44550cbda1e173914fde3feb137e7 /sound/usb
parent4b49f0f7ee1f5de8ea6d1210dfebf2c86f72507f (diff)
downloadlinux-89b593c30e83ee19b7e7c6c7d6092669bebf343e.tar.bz2
ALSA: usb-audio: purge needless variable length array
Variable length array is used in 'snd_us16x08_meter_get()', while there is no need. It's better to purge it because variable length array has overhead for stack handling. This commit replaces the array with static length. Sparse generated below warning. sound/usb/mixer_us16x08.c:714:18: warning: Variable length array is used. Fixes: d2bb390a2081 ("ALSA: usb-audio: Tascam US-16x08 DSP mixer quirk") Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/mixer_us16x08.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/sound/usb/mixer_us16x08.c b/sound/usb/mixer_us16x08.c
index 7ac45ec372b9..73a0b9afdd70 100644
--- a/sound/usb/mixer_us16x08.c
+++ b/sound/usb/mixer_us16x08.c
@@ -711,7 +711,7 @@ static int snd_us16x08_meter_get(struct snd_kcontrol *kcontrol,
struct snd_usb_audio *chip = elem->head.mixer->chip;
struct snd_us16x08_meter_store *store = elem->private_data;
u8 meter_urb[64];
- char tmp[max(sizeof(mix_init_msg1), sizeof(mix_init_msg2))];
+ char tmp[sizeof(mix_init_msg2)] = {0};
if (elem) {
store = (struct snd_us16x08_meter_store *) elem->private_data;
@@ -721,8 +721,8 @@ static int snd_us16x08_meter_get(struct snd_kcontrol *kcontrol,
switch (kcontrol->private_value) {
case 0:
- memcpy(tmp, mix_init_msg1, sizeof(mix_init_msg1));
- snd_us16x08_send_urb(chip, tmp, 4);
+ snd_us16x08_send_urb(chip, (char *)mix_init_msg1,
+ sizeof(mix_init_msg1));
snd_us16x08_recv_urb(chip, meter_urb,
sizeof(meter_urb));
kcontrol->private_value++;
@@ -740,7 +740,7 @@ static int snd_us16x08_meter_get(struct snd_kcontrol *kcontrol,
case 3:
memcpy(tmp, mix_init_msg2, sizeof(mix_init_msg2));
tmp[2] = snd_get_meter_comp_index(store);
- snd_us16x08_send_urb(chip, tmp, 10);
+ snd_us16x08_send_urb(chip, tmp, sizeof(mix_init_msg2));
snd_us16x08_recv_urb(chip, meter_urb,
sizeof(meter_urb));
kcontrol->private_value = 0;