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Enable/disable SR-IOV will change the number of rings, thereby changing the RSS configuration that the user has set. So reject these attempts if netif_is_rxfh_configured() returns true. And remind the user to reset the RSS configuration. Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> Link: https://patch.msgid.link/20250926023843.34340-5-jiawenwu@trustnetic.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>