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Commit e9e68f76 authored by Sameer Pujar's avatar Sameer Pujar Committed by Greg Kroah-Hartman
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ALSA: hda/tegra: clear pending irq handlers 



commit 63d2a9ec310d8bcc955574220d4631aa55c1a80c upstream.

Even after disabling interrupts on the module, it could be possible
that irq handlers are still running. System hang is seen during
suspend path. It was found that, there were pending writes on the
HDA bus and clock was disabled by that time.

Above mentioned issue is fixed by clearing any pending irq handlers
before disabling clocks and returning from hda suspend.

Suggested-by: default avatarMohan Kumar <mkumard@nvidia.com>
Suggested-by: default avatarDara Ramesh <dramesh@nvidia.com>
Signed-off-by: default avatarSameer Pujar <spujar@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 64b9976a

sound/pci/hda/hda_tegra.c

+2 −0
Original line number Diff line number Diff line
@@ -249,10 +249,12 @@ static int hda_tegra_suspend(struct device *dev) 
	struct snd_card *card = dev_get_drvdata(dev);

	struct azx *chip = card->private_data;

	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);

	struct hdac_bus *bus = azx_bus(chip);



	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);



	azx_stop_chip(chip);

	synchronize_irq(bus->irq);

	azx_enter_link_reset(chip);

	hda_tegra_disable_clocks(hda);