ethtool: ioctl: Use array_size() helper in copy_{from,to}_user()
Use array_size() helper instead of the open-coded version in copy_{from,to}_user(). These sorts of multiplication factors need to be wrapped in array_size(). Link: https://github.com/KSPP/linux/issues/160Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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