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[um] hostaudio: don't open-code memdup_user()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-01-02 14:50:51 -05:00
parent 80f8dccf95
commit 1ceb36285c
1 changed files with 3 additions and 7 deletions
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10
arch/um/drivers/hostaudio_kern.c
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@ -105,13 +105,9 @@ static ssize_t hostaudio_write(struct file *file, const char __user *buffer,
printk(KERN_DEBUG "hostaudio: write called, count = %d\n", count);
#endif
kbuf = kmalloc(count, GFP_KERNEL);
if (kbuf == NULL)
return -ENOMEM;
err = -EFAULT;
if (copy_from_user(kbuf, buffer, count))
goto out;
kbuf = memdup_user(buffer, count);
if (IS_ERR(kbuf))
return PTR_ERR(kbuf);
err = os_write_file(state->fd, kbuf, count);
if (err < 0)