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ALSA: sound/usb: 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 09:43:59 +08:00 committed by Takashi Iwai
parent 68425adcc4
commit 85385c1551
2 changed files with 9 additions and 14 deletions
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10
sound/usb/usx2y/us122l.c
View File

@ -349,14 +349,10 @@ static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
return -ENOTTY;
cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return -ENOMEM;
cfg = memdup_user((void *)arg, sizeof(*cfg));
if (IS_ERR(cfg))
return PTR_ERR(cfg);
if (copy_from_user(cfg, (void *)arg, sizeof(*cfg))) {
err = -EFAULT;
goto free;
}
if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
err = -ENXIO;
goto free;

13
sound/usb/usx2y/usX2Yhwdep.c
View File

@ -203,13 +203,12 @@ static int snd_usX2Y_hwdep_dsp_load(struct snd_hwdep *hw,
if (access_ok(VERIFY_READ, dsp->image, dsp->length)) {
struct usb_device* dev = priv->chip.dev;
char *buf = kmalloc(dsp->length, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, dsp->image, dsp->length)) {
kfree(buf);
return -EFAULT;
}
char *buf;
buf = memdup_user(dsp->image, dsp->length);
if (IS_ERR(buf))
return PTR_ERR(buf);
err = usb_set_interface(dev, 0, 1);
if (err)
snd_printk(KERN_ERR "usb_set_interface error \n");