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[ Upstream commitd235649558] RSS configuration requires a valid RX indirection table. When the device reports a single receive queue, rndis_filter_device_add() does not allocate an indirection table, accepting RSS hash key updates in this state leads to a hang. Fix this by gating netvsc_set_rxfh() on ndc->rx_table_sz and return -EOPNOTSUPP when the table is absent. This aligns set_rxfh with the device capabilities and prevents incorrect behavior. Fixes:962f3fee83("netvsc: add ethtool ops to get/set RSS key") Signed-off-by: Aditya Garg <gargaditya@linux.microsoft.com> Reviewed-by: Dipayaan Roy <dipayanroy@linux.microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Link: https://patch.msgid.link/1768212093-1594-1-git-send-email-gargaditya@linux.microsoft.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>