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authorSameer Pujar <spujar@nvidia.com>2018-12-26 10:34:49 (GMT)
committerTakashi Iwai <tiwai@suse.de>2019-01-01 08:31:37 (GMT)
commit63d2a9ec310d8bcc955574220d4631aa55c1a80c (patch)
tree6cd81be4ee16f7a15f1a8565a8d246247490a30b
parent82b01149ec94d746867d7f9156c44d775d4d2d67 (diff)
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>
-rw-r--r--sound/pci/hda/hda_tegra.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 83befd8..97a176d 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -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);

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