Commit cf67c8e7 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Fix endless vmaster hook call in thinkpad_helper.c 



The new vmaster hook, update_tpacpi_mute_led(), calls the original
vmaster hook, but I forgot to save the original hook function but keep
calling the updated one, which of course results in a stupid endless
loop.  Fixed now.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 358b7dfa

sound/pci/hda/thinkpad_helper.c

+5 −5
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/thinkpad_acpi.h>



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)
@@ -30,11 +31,8 @@ static bool is_thinkpad(struct hda_codec *codec) 


static void update_tpacpi_mute_led(void *private_data, int enabled)

{

	struct hda_codec *codec = private_data;

	struct hda_gen_spec *spec = codec->spec;



	if (spec->vmaster_mute.hook)

		spec->vmaster_mute.hook(private_data, enabled);

	if (old_vmaster_hook)

		old_vmaster_hook(private_data, enabled);



	if (led_set_func)

		led_set_func(TPACPI_LED_MUTE, !enabled);
@@ -70,6 +68,7 @@ static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, 


		removefunc = true;

		if (led_set_func(TPACPI_LED_MUTE, false) >= 0) {

			old_vmaster_hook = spec->vmaster_mute.hook;

			spec->vmaster_mute.hook = update_tpacpi_mute_led;

			removefunc = false;

		}
@@ -86,6 +85,7 @@ static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, 
	if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {

		symbol_put(tpacpi_led_set);

		led_set_func = NULL;

		old_vmaster_hook = NULL;

	}

}

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