ALSA: hda - Add NULL check to all PM ops in hda_intel.c

Since devptr can be NULL due to asynchronous probe, all PM ops should
have NULL checks at the beginning.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 35 insertions, 10 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 8edcee5f034d..387fc73a5c89 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -772,10 +772,15 @@ static int azx_suspend(struct device *dev)
 {
         struct pci_dev *pci = to_pci_dev(dev);
         struct snd_card *card = dev_get_drvdata(dev);
-        struct azx *chip = card->private_data;
-        struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
+        struct azx *chip;
+        struct hda_intel *hda;
         struct azx_pcm *p;
 
+        if (!card)
+                return 0;
+
+        chip = card->private_data;
+        hda = container_of(chip, struct hda_intel, chip);
         if (chip->disabled || hda->init_failed)
                 return 0;
 
@@ -806,9 +811,14 @@ static int azx_resume(struct device *dev)
 {
         struct pci_dev *pci = to_pci_dev(dev);
         struct snd_card *card = dev_get_drvdata(dev);
-        struct azx *chip = card->private_data;
-        struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
+        struct azx *chip;
+        struct hda_intel *hda;
 
+        if (!card)
+                return 0;
+
+        chip = card->private_data;
+        hda = container_of(chip, struct hda_intel, chip);
         if (chip->disabled || hda->init_failed)
                 return 0;
 
@@ -844,9 +854,14 @@ static int azx_resume(struct device *dev)
 static int azx_runtime_suspend(struct device *dev)
 {
         struct snd_card *card = dev_get_drvdata(dev);
-        struct azx *chip = card->private_data;
-        struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
+        struct azx *chip;
+        struct hda_intel *hda;
 
+        if (!card)
+                return 0;
+
+        chip = card->private_data;
+        hda = container_of(chip, struct hda_intel, chip);
         if (chip->disabled || hda->init_failed)
                 return 0;
 
@@ -869,12 +884,17 @@ static int azx_runtime_suspend(struct device *dev)
 static int azx_runtime_resume(struct device *dev)
 {
         struct snd_card *card = dev_get_drvdata(dev);
-        struct azx *chip = card->private_data;
-        struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
+        struct azx *chip;
+        struct hda_intel *hda;
         struct hda_bus *bus;
         struct hda_codec *codec;
         int status;
 
+        if (!card)
+                return 0;
+
+        chip = card->private_data;
+        hda = container_of(chip, struct hda_intel, chip);
         if (chip->disabled || hda->init_failed)
                 return 0;
 
@@ -910,9 +930,14 @@ static int azx_runtime_resume(struct device *dev)
 static int azx_runtime_idle(struct device *dev)
 {
         struct snd_card *card = dev_get_drvdata(dev);
-        struct azx *chip = card->private_data;
-        struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
+        struct azx *chip;
+        struct hda_intel *hda;
+
+        if (!card)
+                return 0;
 
+        chip = card->private_data;
+        hda = container_of(chip, struct hda_intel, chip);
         if (chip->disabled || hda->init_failed)
                 return 0;