sound fixes for 4.12-rc1

This contains a one-liner change that has a significant impact:
 disabling the build of OSS.  It's been unmaintained for long time,
 and we'd like to drop the stuff.  Finally, as the first step, stop
 the build.  Let's see whether it works without much complaints.
 
 Other than that, there are two small fixes for HD-audio.
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Merge tag 'sound-fix-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "This contains a one-liner change that has a significant impact:
  disabling the build of OSS. It's been unmaintained for long time, and
  we'd like to drop the stuff. Finally, as the first step, stop the
  build. Let's see whether it works without much complaints.

  Other than that, there are two small fixes for HD-audio"

* tag 'sound-fix-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  sound: Disable the build of OSS drivers
  ALSA: hda: Fix cpu lockup when stopping the cmd dmas
  ALSA: hda - Add mute led support for HP EliteBook 840 G3

sound/Kconfig

@@ -115,6 +115,7 @@ endif # SND
 menuconfig SOUND_PRIME
 	tristate "Open Sound System (DEPRECATED)"
 	select SOUND_OSS_CORE
+	depends on BROKEN
 	help
 	  Say 'Y' or 'M' to enable Open Sound System drivers.
 

sound/hda/hdac_controller.c

@@ -106,7 +106,11 @@ void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus)
 	/* disable ringbuffer DMAs */
 	snd_hdac_chip_writeb(bus, RIRBCTL, 0);
 	snd_hdac_chip_writeb(bus, CORBCTL, 0);
+	spin_unlock_irq(&bus->reg_lock);
+
 	hdac_wait_for_cmd_dmas(bus);
+
+	spin_lock_irq(&bus->reg_lock);
 	/* disable unsolicited responses */
 	snd_hdac_chip_updatel(bus, GCTL, AZX_GCTL_UNSOL, 0);
 	spin_unlock_irq(&bus->reg_lock);

sound/pci/hda/patch_conexant.c

@@ -860,7 +860,9 @@ static const struct hda_fixup cxt_fixups[] = {
 			{ 0x16, 0x21011020 }, /* line-out */
 			{ 0x18, 0x2181103f }, /* line-in */
 			{ }
-		}
+		},
+		.chained = true,
+		.chain_id = CXT_FIXUP_MUTE_LED_GPIO,
 	},
 	[CXT_FIXUP_HP_SPECTRE] = {
 		.type = HDA_FIXUP_PINS,