diff mbox series

[5.10,059/126] ALSA: hda: Add missing sanity checks in PM prepare/complete callbacks

Message ID 20210405085033.006776298@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 5, 2021, 8:53 a.m. UTC 
From: Takashi Iwai <tiwai@suse.de>

commit 66affb7bb0dc0905155a1b2475261aa704d1ddb5 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: f5dac54d9d93 ("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>
---
 sound/pci/hda/hda_intel.c |    6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1023,6 +1023,9 @@  static int azx_prepare(struct device *de
 	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 *
 	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;