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ALSA: control: Use struct_size()

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For code simplification and safety, use struct_size() macro for
calculating the snd_kcontrol object size with the variable array.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2019-05-31 11:44:44 +02:00
parent c86ccfba17
commit 65be958088
1 changed files with 1 additions and 5 deletions
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6
sound/core/control.c
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@ -211,16 +211,12 @@ EXPORT_SYMBOL(snd_ctl_notify);
static int snd_ctl_new(struct snd_kcontrol **kctl, unsigned int count,
unsigned int access, struct snd_ctl_file *file)
{
unsigned int size;
unsigned int idx;
if (count == 0 || count > MAX_CONTROL_COUNT)
return -EINVAL;
size = sizeof(struct snd_kcontrol);
size += sizeof(struct snd_kcontrol_volatile) * count;
*kctl = kzalloc(size, GFP_KERNEL);
*kctl = kzalloc(struct_size(*kctl, vd, count), GFP_KERNEL);
if (!*kctl)
return -ENOMEM;