ALSA: timer: Propagate the error at initialization

... instead of just printing errors.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 777a45e08e539aa3c7320f31c5d1329db1ea0944..28b673d4f8124be43d17cf2bcff278d5afdcd497 100644 (file)
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1942,6 +1942,15 @@ static const struct file_operations snd_timer_f_ops =
        .fasync =       snd_timer_user_fasync,
 };
 
+/* unregister the system timer */
+static void snd_timer_free_all(void)
+{
+       struct snd_timer *timer, *n;
+
+       list_for_each_entry_safe(timer, n, &snd_timer_list, device_list)
+               snd_timer_free(timer);
+}
+
 /*
  *  ENTRY functions
  */
@@ -1955,25 +1964,28 @@ static int __init alsa_timer_init(void)
                              "system timer");
 #endif
 
-       if ((err = snd_timer_register_system()) < 0)
+       err = snd_timer_register_system();
+       if (err < 0) {
                pr_err("ALSA: unable to register system timer (%i)\n", err);
-       if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0,
-                                      &snd_timer_f_ops, NULL, "timer")) < 0)
+               return err;
+       }
+
+       err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0,
+                                 &snd_timer_f_ops, NULL, "timer");
+       if (err < 0) {
                pr_err("ALSA: unable to register timer device (%i)\n", err);
+               snd_timer_free_all();
+               return err;
+       }
+
        snd_timer_proc_init();
        return 0;
 }
 
 static void __exit alsa_timer_exit(void)
 {
-       struct list_head *p, *n;
-
        snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0);
-       /* unregister the system timer */
-       list_for_each_safe(p, n, &snd_timer_list) {
-               struct snd_timer *timer = list_entry(p, struct snd_timer, device_list);
-               snd_timer_free(timer);
-       }
+       snd_timer_free_all();
        snd_timer_proc_done();
 #ifdef SNDRV_OSS_INFO_DEV_TIMERS
        snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1);