Staging: rtl8712: Use memdup_user() instead of copy_from_user()
Use memdup_user() to avoid its duplicated implementation and simplify code. memdup_user() uses GFP_KERNEL instead of GFP_ATOMIC, which is valid because copy_from_user() might sleep and it's useless to make the allocation atomic. Found with coccinelle. Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1912,13 +1912,9 @@ static int r871x_mp_ioctl_hdl(struct net_device *dev,
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bset = (u8)(p->flags & 0xFFFF);
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len = p->length;
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pparmbuf = NULL;
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pparmbuf = kmalloc(len, GFP_ATOMIC);
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if (pparmbuf == NULL) {
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ret = -ENOMEM;
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goto _r871x_mp_ioctl_hdl_exit;
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}
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if (copy_from_user(pparmbuf, p->pointer, len)) {
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ret = -EFAULT;
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pparmbuf = memdup_user(p->pointer, len);
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if (IS_ERR(pparmbuf)) {
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ret = PTR_ERR(pparmbuf);
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goto _r871x_mp_ioctl_hdl_exit;
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}
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poidparam = (struct mp_ioctl_param *)pparmbuf;
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