ALSA: usb-audio: Drop CONFIG_PM ifdefs

Practically seen, CONFIG_PM is almost mandatory.
Let's drop the ugly ifdef lines and simplify the code.

Link: https://lore.kernel.org/r/20211202084053.18201-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/card.c

@@ -987,8 +987,6 @@ void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
 		wake_up(&chip->shutdown_wait);
 }
 
-#ifdef CONFIG_PM
-
 int snd_usb_autoresume(struct snd_usb_audio *chip)
 {
 	int i, err;
@@ -1100,11 +1098,6 @@ err_out:
 	atomic_dec(&chip->active); /* allow autopm after this point */
 	return err;
 }
-#else
-#define usb_audio_suspend	NULL
-#define usb_audio_resume	NULL
-#define usb_audio_resume	NULL
-#endif		/* CONFIG_PM */
 
 static const struct usb_device_id usb_audio_ids [] = {
 #include "quirks-table.h"

sound/usb/mixer.c

@@ -3629,7 +3629,6 @@ void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
 	mixer->disconnected = true;
 }
 
-#ifdef CONFIG_PM
 /* stop any bus activity of a mixer */
 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
 {
@@ -3711,7 +3710,6 @@ int snd_usb_mixer_resume(struct usb_mixer_interface *mixer)
 
 	return snd_usb_mixer_activate(mixer);
 }
-#endif
 
 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
 				 struct usb_mixer_interface *mixer,
@@ -3720,7 +3718,5 @@ void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
 	list->mixer = mixer;
 	list->id = unitid;
 	list->dump = snd_usb_mixer_dump_cval;
-#ifdef CONFIG_PM
 	list->resume = restore_mixer_value;
-#endif
 }

sound/usb/mixer.h

@@ -118,10 +118,8 @@ void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 			  unsigned int size, unsigned int __user *_tlv);
 
-#ifdef CONFIG_PM
 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer);
-#endif
 
 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
                              int index, int value);

sound/usb/mixer_quirks.c

@@ -3280,7 +3280,6 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 	return err;
 }
 
-#ifdef CONFIG_PM
 void snd_usb_mixer_resume_quirk(struct usb_mixer_interface *mixer)
 {
 	switch (mixer->chip->usb_id) {
@@ -3289,7 +3288,6 @@ void snd_usb_mixer_resume_quirk(struct usb_mixer_interface *mixer)
 		break;
 	}
 }
-#endif
 
 void snd_usb_mixer_rc_memory_change(struct usb_mixer_interface *mixer,
 				    int unitid)

sound/usb/mixer_quirks.h

@@ -14,9 +14,7 @@ void snd_usb_mixer_fu_apply_quirk(struct usb_mixer_interface *mixer,
 				  struct usb_mixer_elem_info *cval, int unitid,
 				  struct snd_kcontrol *kctl);
 
-#ifdef CONFIG_PM
 void snd_usb_mixer_resume_quirk(struct usb_mixer_interface *mixer);
-#endif
 
 #endif /* SND_USB_MIXER_QUIRKS_H */
 

sound/usb/power.h

@@ -21,17 +21,7 @@ struct snd_usb_power_domain *
 snd_usb_find_power_domain(struct usb_host_interface *ctrl_iface,
 			  unsigned char id);
 
-#ifdef CONFIG_PM
 int snd_usb_autoresume(struct snd_usb_audio *chip);
 void snd_usb_autosuspend(struct snd_usb_audio *chip);
-#else
-static inline int snd_usb_autoresume(struct snd_usb_audio *chip)
-{
-	return 0;
-}
-static inline void snd_usb_autosuspend(struct snd_usb_audio *chip)
-{
-}
-#endif
 
 #endif /* __USBAUDIO_POWER_H */