Merge tag 'sound-4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...

Pull sound fixes from Takashi Iwai:
 "Still more incoming fixes than wished at this stage, but all look like
  small and reasonable fixes.

  In addition to the usual HD-audio and USB-audio quirks for various
  devices, two notable changes are included:

   - a fix for USB-audio UAF at probing a malformed descriptor

   - workarounds for PCM rwsem mutex starvation"

* tag 'sound-4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: Fix mic issue on Acer AIO Veriton Z4860G/Z6860G
  ALSA: hda/realtek: Fix mic issue on Acer AIO Veriton Z4660G
  ALSA: hda/realtek - Add support for Acer Aspire C24-860 headset mic
  ALSA: hda/realtek: ALC286 mic and headset-mode fixups for Acer Aspire U27-880
  ALSA: usb-audio: Fix UAF decrement if card has no live interfaces in card.c
  ALSA: hda/realtek - Fix speaker output regression on Thinkpad T570
  ALSA: pcm: Fix interval evaluation with openmin/max
  ALSA: hda: Add support for AMD Stoney Ridge
  ALSA: usb-audio: Add SMSL D1 to quirks for native DSD support
  ALSA: pcm: Fix starvation on down_write_nonblock()
  ALSA: pcm: Call snd_pcm_unlink() conditionally at closing