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authorSameer Pujar <spujar@nvidia.com>2018-12-26 16:04:49 +0530
committerTakashi Iwai <tiwai@suse.de>2019-01-01 09:31:37 +0100
commit63d2a9ec310d8bcc955574220d4631aa55c1a80c (patch)
tree6cd81be4ee16f7a15f1a8565a8d246247490a30b /sound
parent82b01149ec94d746867d7f9156c44d775d4d2d67 (diff)
downloadlinux-63d2a9ec310d8bcc955574220d4631aa55c1a80c.tar.gz
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>
Diffstat (limited to 'sound')
-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 83befd8d43e8..97a176d817a0 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);