[alsa-devel] [patch] ALSA: usb-audio: harmless underflow in snd_audigy2nx_led_put()
We want to verify that "value" is either zero or one, so we test if it is greater than one. Unfortunately, this is a signed int so it could also be negative. I think this is harmless but it introduces a static checker warning. Let's make "value" unsigned.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index 337c317..4602a78 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -340,7 +340,7 @@ static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol); struct usb_mixer_interface *mixer = list->mixer; int index = kcontrol->private_value & 0xff; - int value = ucontrol->value.integer.value[0]; + unsigned int value = ucontrol->value.integer.value[0]; int old_value = kcontrol->private_value >> 8; int err;
On Mon, 28 Sep 2015 12:06:20 +0200, Dan Carpenter wrote:
We want to verify that "value" is either zero or one, so we test if it is greater than one. Unfortunately, this is a signed int so it could also be negative. I think this is harmless but it introduces a static checker warning. Let's make "value" unsigned.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com
Applied, thanks.
Takashi
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index 337c317..4602a78 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -340,7 +340,7 @@ static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol); struct usb_mixer_interface *mixer = list->mixer; int index = kcontrol->private_value & 0xff;
- int value = ucontrol->value.integer.value[0];
- unsigned int value = ucontrol->value.integer.value[0]; int old_value = kcontrol->private_value >> 8; int err;
participants (2)
-
Dan Carpenter
-
Takashi Iwai