ALSA: hda - Move runtime PM check to runtime_idle callback

The runtime_idle callback is the right place to check the suspend
capability, but currently we do it wrongly in the runtime_suspend
callback.  This leads to a kernel error message like:
   pci_pm_runtime_suspend(): azx_runtime_suspend+0x0/0x50 [snd_hda_intel] returns -11
and the runtime PM core would even repeat the attempts.

Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Cc: <stable@vger.kernel.org> [v3.7]
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 1da8a5c9b9e1a1e51712bcaedfed9859bde675f0..0f3d3db0df71a3110d48643ab0dd214ca0897cd3 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2691,10 +2691,6 @@ static int azx_runtime_suspend(struct device *dev)
        struct snd_card *card = dev_get_drvdata(dev);
        struct azx *chip = card->private_data;
 
-       if (!power_save_controller ||
-           !(chip->driver_caps & AZX_DCAPS_PM_RUNTIME))
-               return -EAGAIN;
-
        azx_stop_chip(chip);
        azx_clear_irq_pending(chip);
        return 0;
@@ -2709,12 +2705,25 @@ static int azx_runtime_resume(struct device *dev)
        azx_init_chip(chip, 1);
        return 0;
 }
+
+static int azx_runtime_idle(struct device *dev)
+{
+       struct snd_card *card = dev_get_drvdata(dev);
+       struct azx *chip = card->private_data;
+
+       if (!power_save_controller ||
+           !(chip->driver_caps & AZX_DCAPS_PM_RUNTIME))
+               return -EBUSY;
+
+       return 0;
+}
+
 #endif /* CONFIG_PM_RUNTIME */
 
 #ifdef CONFIG_PM
 static const struct dev_pm_ops azx_pm = {
        SET_SYSTEM_SLEEP_PM_OPS(azx_suspend, azx_resume)
-       SET_RUNTIME_PM_OPS(azx_runtime_suspend, azx_runtime_resume, NULL)
+       SET_RUNTIME_PM_OPS(azx_runtime_suspend, azx_runtime_resume, azx_runtime_idle)
 };
 
 #define AZX_PM_OPS     &azx_pm