ALSA: hda - Add reboot notifier (0cbf0098) · Commits · 戴 / test

sound/pci/hda/hda_intel.c

+29 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,7 @@
		#include <linux/slab.h>
		#include <linux/pci.h>
		#include <linux/mutex.h>
		#include <linux/reboot.h>
		#include <sound/core.h>
		#include <sound/initval.h>
		#include "hda_codec.h"
		@@ -397,6 +398,9 @@ struct azx {

		/* for pending irqs */
		struct work_struct irq_pending_work;

		/* reboot notifier (for mysterious hangup problem at power-down) */
		struct notifier_block reboot_notifier;
		};

		/* driver types */
		@@ -1978,6 +1982,28 @@ static int azx_resume(struct pci_dev *pci)
		#endif /* CONFIG_PM */


		/*
		* reboot notifier for hang-up problem at power-down
		*/
		static int azx_halt(struct notifier_block nb, unsigned long event, void buf)
		{
		struct azx *chip = container_of(nb, struct azx, reboot_notifier);
		azx_stop_chip(chip);
		return NOTIFY_OK;
		}

		static void azx_notifier_register(struct azx *chip)
		{
		chip->reboot_notifier.notifier_call = azx_halt;
		register_reboot_notifier(&chip->reboot_notifier);
		}

		static void azx_notifier_unregister(struct azx *chip)
		{
		if (chip->reboot_notifier.notifier_call)
		unregister_reboot_notifier(&chip->reboot_notifier);
		}

		/*
		* destructor
		*/
		@@ -1985,6 +2011,8 @@ static int azx_free(struct azx *chip)
		{
		int i;

		azx_notifier_unregister(chip);

		if (chip->initialized) {
		azx_clear_irq_pending(chip);
		for (i = 0; i < chip->num_streams; i++)
		@@ -2348,6 +2376,7 @@ static int __devinit azx_probe(struct pci_dev *pci,
		pci_set_drvdata(pci, card);
		chip->running = 1;
		power_down_all_codecs(chip);
		azx_notifier_register(chip);

		dev++;
		return err;