[ALSA] ppc-beep - handle errors from input_register_device()

ppc-beep: handle errors from input_register_device()
(Also fixed the wrong memory release in the error path.)

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

diff --git a/sound/ppc/beep.c b/sound/ppc/beep.c
index 5fec1e5..5f38f67 100644 (file)
--- a/sound/ppc/beep.c
+++ b/sound/ppc/beep.c
@@ -215,15 +215,18 @@ int __init snd_pmac_attach_beep(struct snd_pmac *chip)
 {
        struct pmac_beep *beep;
        struct input_dev *input_dev;
+       struct snd_kcontrol *beep_ctl;
        void *dmabuf;
        int err = -ENOMEM;
 
        beep = kzalloc(sizeof(*beep), GFP_KERNEL);
+       if (! beep)
+               return -ENOMEM;
        dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
                                    &beep->addr, GFP_KERNEL);
        input_dev = input_allocate_device();
-       if (!beep || !dmabuf || !input_dev)
-               goto fail;
+       if (! dmabuf || ! input_dev)
+               goto fail1;
 
        /* FIXME: set more better values */
        input_dev->name = "PowerMac Beep";
@@ -244,17 +247,24 @@ int __init snd_pmac_attach_beep(struct snd_pmac *chip)
        beep->volume = BEEP_VOLUME;
        beep->running = 0;
 
-       err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_pmac_beep_mixer, chip));
+       beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip);
+       err = snd_ctl_add(chip->card, beep_ctl);
        if (err < 0)
-               goto fail;
+               goto fail1;
+ 
+       chip->beep = beep;
 
-       chip->beep = beep;
-       input_register_device(beep->dev);
-
-       return 0;
-
- fail: input_free_device(input_dev);
-       kfree(dmabuf);
+       err = input_register_device(beep->dev);
+       if (err)
+               goto fail2;
+ 
+       return 0;
+ 
+ fail2:        snd_ctl_remove(chip->card, beep_ctl);
+ fail1:        input_free_device(input_dev);
+       if (dmabuf)
+               dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
+                                 dmabuf, beep->addr);
        kfree(beep);
        return err;
 }