[PATCH 0/3] ALSA: usb-audio: Small improvements in mixer handling

[Greg Kroah-Hartman]

On Thu, Oct 14, 2021 at 03:06:33PM +0200, Takashi Iwai wrote:
> Hi,
> 
> this is a patchset with small fixes for improving the USB-audio mixer
> behavior.  Instead of treating the error from a control message
> continuously, initialize all at the probe and keep the rest working.
> 
> The first two patches are rather fixes for error messages in
> get_ctl_value_v2() function, the last one implements the new
> behavior.
> 
> 
> Takashi
> 
> ===
> 
> Takashi Iwai (3):
>   ALSA: usb-audio: Downgrade error message in get_ctl_value_v2()
>   ALSA: usb-audio: Drop superfluous error message after disconnection
>   ALSA: usb-audio: Initialize every feature unit once at probe time
> 
>  sound/usb/mixer.c | 42 ++++++++++++++++++++++++++++++++++++------
>  1 file changed, 36 insertions(+), 6 deletions(-)
> 
> -- 
> 2.26.2
> 

These work great for me, combined with the quirk patch I sent:

Tested-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>