ALSA: ac97 - Fix missing NULL check in snd_ac97_cvol_new()

commit 733a48e5ae5bf28b046fad984d458c747cbb8c21 upstream.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=44721

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 9473fca9681dd7e291595501a6270c47793aa3bc..8b0f996883034c4b99b4823ea7a6f01b6d064587 100644 (file)
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1271,6 +1271,8 @@ static int snd_ac97_cvol_new(struct snd_card *card, char *name, int reg, unsigne
                tmp.index = ac97->num;
                kctl = snd_ctl_new1(&tmp, ac97);
        }
+       if (!kctl)
+               return -ENOMEM;
        if (reg >= AC97_PHONE && reg <= AC97_PCM)
                set_tlv_db_scale(kctl, db_scale_5bit_12db_max);
        else