ALSA: hda - Fix race between PM ops and HDA init/probe

PM ops could be triggered before HDA is done initializing
and cause PM to set HDA controller to D3Hot.  This can result
in "CORB reset timeout#2, CORBRP = 65535" and "no codecs
initialized".  Additionally, PM ops can be triggered before
azx_probe_continue finishes (async probe).  This can result
in a NULL deref kernel crash.

To fix this, avoid PM ops if !chip->running.

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 735bdcb..c38c68f 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -867,7 +867,7 @@ static int azx_suspend(struct device *dev)
 
        chip = card->private_data;
        hda = container_of(chip, struct hda_intel, chip);
-       if (chip->disabled || hda->init_failed)
+       if (chip->disabled || hda->init_failed || !chip->running)
                return 0;
 
        bus = azx_bus(chip);
@@ -902,7 +902,7 @@ static int azx_resume(struct device *dev)
 
        chip = card->private_data;
        hda = container_of(chip, struct hda_intel, chip);
-       if (chip->disabled || hda->init_failed)
+       if (chip->disabled || hda->init_failed || !chip->running)
                return 0;
 
        if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL
@@ -1027,7 +1027,7 @@ static int azx_runtime_idle(struct device *dev)
                return 0;
 
        if (!power_save_controller || !azx_has_pm_runtime(chip) ||
-           azx_bus(chip)->codec_powered)
+           azx_bus(chip)->codec_powered || !chip->running)
                return -EBUSY;
 
        return 0;