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    SubjectRe: [PATCH] sound: usb: mixer: increase control transfer timeout
    Felipe Balbi wrote:
    > 100ms might not be enough for slower devices. Increasing
    > timeout to 1000ms doesn't seem like overkill.
    >
    > --- a/sound/usb/mixer.c
    > +++ b/sound/usb/mixer.c
    > @@ -296,7 +296,7 @@ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int v
    > 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) {
    > + buf, val_len, 1000) >= val_len) {

    If the timeout for reading values needs to be increased, writing (in
    snd_usb_mixer_set_ctl_value) probably needs some attention too.


    Regards,
    Clemens


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