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ALSA: hda/tegra: clear pending irq handlers 

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: Mohan Kumar <mkumard@nvidia.com>
Suggested-by: Dara Ramesh <dramesh@nvidia.com>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Sameer Pujar 2018-12-26 16:04:49 +05:30 committed by Takashi Iwai
parent 82b01149ec
commit 63d2a9ec31
1 changed files with 2 additions and 0 deletions
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2
sound/pci/hda/hda_tegra.c
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@ -234,10 +234,12 @@ 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);