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ALSA: hda: Add missing sanity checks in PM prepare/complete callbacks

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commit 66affb7bb0 upstream.

The recently added PM prepare and complete callbacks don't have the
sanity check whether the card instance has been properly initialized,
which may potentially lead to Oops.

This patch adds the azx_is_pm_ready() call in each place
appropriately like other PM callbacks.

Fixes: f5dac54d9d ("ALSA: hda: Separate runtime and system suspend")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210329113059.25035-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2021-03-29 13:30:59 +02:00 committed by Greg Kroah-Hartman
parent b3116cda4e
commit 6d91f3afb6
1 changed files with 6 additions and 0 deletions
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6
sound/pci/hda/hda_intel.c
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@ -1023,6 +1023,9 @@ static int azx_prepare(struct device *dev)
struct snd_card *card = dev_get_drvdata(dev);
struct azx *chip;
if (!azx_is_pm_ready(card))
return 0;
chip = card->private_data;
chip->pm_prepared = 1;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
@ -1040,6 +1043,9 @@ static void azx_complete(struct device *dev)
struct snd_card *card = dev_get_drvdata(dev);
struct azx *chip;
if (!azx_is_pm_ready(card))
return;
chip = card->private_data;
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
chip->pm_prepared = 0;