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ALSA: sound/isa: use memdup_user()

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Remove open-coded memdup_user().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Li Zefan 2009-04-10 09:43:36 +08:00 committed by Takashi Iwai
parent ef44a1ec6e
commit 68425adcc4
3 changed files with 20 additions and 24 deletions
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15
sound/isa/sb/sb16_csp.c
View file

@ -684,15 +684,16 @@ static int snd_sb_csp_load(struct snd_sb_csp * p, const unsigned char *buf, int
static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags)
{
int err = -ENOMEM;
unsigned char *kbuf = kmalloc(size, GFP_KERNEL);
if (kbuf) {
if (copy_from_user(kbuf, buf, size))
err = -EFAULT;
else
int err;
unsigned char *kbuf;
kbuf = memdup_user(buf, size);
if (IS_ERR(kbuf))
return PTR_ERR(kbuf);
err = snd_sb_csp_load(p, kbuf, size, load_flags);
kfree(kbuf);
}
return err;
}

14
sound/isa/wavefront/wavefront_fx.c
View file

@ -210,15 +210,11 @@ snd_wavefront_fx_ioctl (struct snd_hwdep *sdev, struct file *file,
"> 512 bytes to FX\n");
return -EIO;
}
page_data = kmalloc(r.data[2] * sizeof(short), GFP_KERNEL);
if (!page_data)
return -ENOMEM;
if (copy_from_user (page_data,
(unsigned char __user *) r.data[3],
r.data[2] * sizeof(short))) {
kfree(page_data);
return -EFAULT;
}
page_data = memdup_user((unsigned char __user *)
r.data[3],
r.data[2] * sizeof(short));
if (IS_ERR(page_data))
return PTR_ERR(page_data);
pd = page_data;
}

11
sound/isa/wavefront/wavefront_synth.c
View file

@ -1664,12 +1664,11 @@ snd_wavefront_synth_ioctl (struct snd_hwdep *hw, struct file *file,
break;
case WFCTL_WFCMD:
wc = kmalloc(sizeof(*wc), GFP_KERNEL);
if (! wc)
return -ENOMEM;
if (copy_from_user (wc, argp, sizeof (*wc)))
err = -EFAULT;
else if (wavefront_synth_control (acard, wc) < 0)
wc = memdup_user(argp, sizeof(*wc));
if (IS_ERR(wc))
return PTR_ERR(wc);
if (wavefront_synth_control (acard, wc) < 0)
err = -EIO;
else if (copy_to_user (argp, wc, sizeof (*wc)))
err = -EFAULT;