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authorChris Metcalf <cmetcalf@tilera.com>2010-07-06 13:45:24 -0400
committerChris Metcalf <cmetcalf@tilera.com>2010-07-06 13:45:24 -0400
commita2262d8a231e92742651859a10c9a4430a5e899a (patch)
treeb5a823e3f6a3f60e1dd995f113caf0b350228d84 /sound/usb/mixer.c
parentef06f55a5c936a395f3ee2e1237bbebdb4396c65 (diff)
parent815c4163b6c8ebf8152f42b0a5fd015cfdcedc78 (diff)
Merge branch 'master' into for-linus
Diffstat (limited to 'sound/usb/mixer.c')
-rw-r--r--sound/usb/mixer.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index a060d005e20..6939d0f517d 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -297,20 +297,27 @@ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int v
static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
{
- unsigned char buf[14]; /* enough space for one range of 4 bytes */
+ unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
unsigned char *val;
- int ret;
+ int ret, size;
__u8 bRequest;
- bRequest = (request == UAC_GET_CUR) ?
- UAC2_CS_CUR : UAC2_CS_RANGE;
+ if (request == UAC_GET_CUR) {
+ bRequest = UAC2_CS_CUR;
+ size = sizeof(__u16);
+ } else {
+ bRequest = UAC2_CS_RANGE;
+ size = sizeof(buf);
+ }
+
+ memset(buf, 0, sizeof(buf));
ret = snd_usb_ctl_msg(cval->mixer->chip->dev,
usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
bRequest,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
validx, cval->mixer->ctrlif | (cval->id << 8),
- buf, sizeof(buf), 1000);
+ buf, size, 1000);
if (ret < 0) {
snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
@@ -318,6 +325,8 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int v
return ret;
}
+ /* FIXME: how should we handle multiple triplets here? */
+
switch (request) {
case UAC_GET_CUR:
val = buf;