From: Lukas Wunner <lukas@wunner.de>
Date: Thu, 14 Jan 2016 21:05:03 +0000 (+0100)
Subject: ALSA: hda - Use acpi_dev_present()
X-Git-Tag: next-20160301~63^2~11
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c3a900581e1137bdc2efc25325d99fcc9bb9ab1e;p=karo-tx-linux.git

ALSA: hda - Use acpi_dev_present()

Use shiny new acpi_dev_present() and remove all the boilerplate
to search for a particular ACPI device. No functional change.
Cf. 2d12b6b381ba ("ACPI / utils: Add acpi_dev_present()").

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/pci/hda/thinkpad_helper.c b/sound/pci/hda/thinkpad_helper.c
index 0a4ad5feb82e..59ab6cee1ad8 100644
--- a/sound/pci/hda/thinkpad_helper.c
+++ b/sound/pci/hda/thinkpad_helper.c
@@ -10,23 +10,10 @@
 static int (*led_set_func)(int, bool);
 static void (*old_vmaster_hook)(void *, int);
 
-static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context,
-				 void **rv)
-{
-	bool *found = context;
-	*found = true;
-	return AE_OK;
-}
-
 static bool is_thinkpad(struct hda_codec *codec)
 {
-	bool found = false;
-	if (codec->core.subsystem_id >> 16 != 0x17aa)
-		return false;
-	if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found)
-		return true;
-	found = false;
-	return ACPI_SUCCESS(acpi_get_devices("IBM0068", acpi_check_cb, &found, NULL)) && found;
+	return (codec->core.subsystem_id >> 16 == 0x17aa) &&
+	       (acpi_dev_present("LEN0068") || acpi_dev_present("IBM0068"));
 }
 
 static void update_tpacpi_mute_led(void *private_data, int enabled)