GSD-2021-1002543 ethtool: ioctl: fix potential NULL deref in ethtool_set_coalesce()

ethtool: ioctl: fix potential NULL deref in ethtoolsetcoalesce This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.6 by commit...