diff options
Diffstat (limited to 'sound/usb/mixer.c')
| -rw-r--r-- | sound/usb/mixer.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 09e59345bb6d..5e4775716607 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -61,6 +61,7 @@ #include "mixer.h" #include "helper.h" #include "mixer_quirks.h" +#include "power.h" #define MAX_ID_ELEMS 256 @@ -295,16 +296,22 @@ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int v unsigned char buf[2]; int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; int timeout = 10; + int err; + err = snd_usb_autoresume(cval->mixer->chip); + if (err < 0) + return -EIO; while (timeout-- > 0) { if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), buf, val_len, 100) >= val_len) { *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); + snd_usb_autosuspend(cval->mixer->chip); return 0; } } + snd_usb_autosuspend(cval->mixer->chip); snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type); return -EINVAL; @@ -328,12 +335,18 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int v memset(buf, 0, sizeof(buf)); + ret = snd_usb_autoresume(chip) ? -EIO : 0; + if (ret) + goto error; + ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), buf, size, 1000); + snd_usb_autosuspend(chip); if (ret < 0) { +error: snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type); return ret; @@ -413,7 +426,7 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, { struct snd_usb_audio *chip = cval->mixer->chip; unsigned char buf[2]; - int val_len, timeout = 10; + int val_len, err, timeout = 10; if (cval->mixer->protocol == UAC_VERSION_1) { val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; @@ -433,13 +446,19 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, value_set = convert_bytes_value(cval, value_set); buf[0] = value_set & 0xff; buf[1] = (value_set >> 8) & 0xff; + err = snd_usb_autoresume(chip); + if (err < 0) + return -EIO; while (timeout-- > 0) if (snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0), request, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), - buf, val_len, 100) >= 0) + buf, val_len, 100) >= 0) { + snd_usb_autosuspend(chip); return 0; + } + snd_usb_autosuspend(chip); snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]); return -EINVAL; |