[ALSA] emu10k1 - Check value ranges in ctl callbacks

Check value ranges in ctl callbacks properly.  This fixes the unexpected
crash due to wrong value assignment.
Also, remove invalid comments in the last patch.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/pci/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index d619a3842cdd..9fd3135f3118 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -742,6 +742,8 @@ static int snd_p16v_capture_source_put(struct snd_kcontrol *kcontrol,
         u32 source;
 
         val = ucontrol->value.enumerated.item[0] ;
+        if (val > 7)
+                return -EINVAL;
         change = (emu->p16v_capture_source != val);
         if (change) {
                 emu->p16v_capture_source = val;
@@ -784,6 +786,8 @@ static int snd_p16v_capture_channel_put(struct snd_kcontrol *kcontrol,
         u32 tmp;
 
         val = ucontrol->value.enumerated.item[0] ;
+        if (val > 3)
+                return -EINVAL;
         change = (emu->p16v_capture_channel != val);
         if (change) {
                 emu->p16v_capture_channel = val;