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Always take the rss_lock in ethtool_set_rxfh(). We will want to make a similar change in ethtool_set_rxfh_fields() and some drivers lock that callback regardless of rss context ID being set. Having some callbacks locked unconditionally and some only if context ID is set would be very confusing. ethtool handling is under rtnl_lock, so rss_lock is very unlikely to ever be congested. Link: https://patch.msgid.link/20250626202848.104457-2-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>