Patch "ASoC: acpi: fix machine driver selection based on quirk" has been added to the 4.15-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    ASoC: acpi: fix machine driver selection based on quirk

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     asoc-acpi-fix-machine-driver-selection-based-on-quirk.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 5c256045b87b8aa8e5bc9d2e2fdc0802351c1f99 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Fri, 5 Jan 2018 14:55:33 -0600
Subject: ASoC: acpi: fix machine driver selection based on quirk
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

commit 5c256045b87b8aa8e5bc9d2e2fdc0802351c1f99 upstream.

The ACPI/machine-driver code refactoring introduced in 4.13 introduced
a regression for cases where we need a DMI-based quirk to select the
machine driver (the BIOS reports an invalid HID). The fix is just to
make sure the results of the quirk are actually used.

Fixes: 54746dabf770 ('ASoC: Improve machine driver selection based on quirk data')
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=96691
Tested-by: Nicole Færber <nicole.faerber@dpin.de>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/soc-acpi.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/sound/soc/soc-acpi.c
+++ b/sound/soc/soc-acpi.c
@@ -84,11 +84,9 @@ snd_soc_acpi_find_machine(struct snd_soc
 
 	for (mach = machines; mach->id[0]; mach++) {
 		if (snd_soc_acpi_check_hid(mach->id) == true) {
-			if (mach->machine_quirk == NULL)
-				return mach;
-
-			if (mach->machine_quirk(mach) != NULL)
-				return mach;
+			if (mach->machine_quirk)
+				mach = mach->machine_quirk(mach);
+			return mach;
 		}
 	}
 	return NULL;


Patches currently in stable-queue which might be from pierre-louis.bossart@linux.intel.com are

queue-4.15/asoc-acpi-fix-machine-driver-selection-based-on-quirk.patch