iavf: Fix promiscuous mode configuration flow messages
Currently when configuring promiscuous mode on the AVF we detect a change in the netdev->flags. We use IFF_PROMISC and IFF_ALLMULTI to determine whether or not we need to request/release promiscuous mode and/or multicast promiscuous mode. The problem is that the AQ calls for setting/clearing promiscuous/multicast mode are treated separately. This leads to a case where we can trigger two promiscuous mode AQ calls in a row with the incorrect state. To fix this make a few changes. Use IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE instead of the previous IAVF_FLAG_AQ_[REQUEST|RELEASE]_[PROMISC|ALLMULTI] flags. In iavf_set_rx_mode() detect if there is a change in the netdev->flags in comparison with adapter->flags and set the IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE aq_required bit. Then in iavf_process_aq_command() only check for IAVF_FLAG_CONFIGURE_PROMISC_MODE and call iavf_set_promiscuous() if it's set. In iavf_set_promiscuous() check again to see which (if any) promiscuous mode bits have changed when comparing the netdev->flags with the adapter->flags. Use this to set the flags which get sent to the PF driver. Add a spinlock that is used for updating current_netdev_promisc_flags and only allows one promiscuous mode AQ at a time. [1] Fixes the fact that we will only have one AQ call in the aq_required queue at any one time. [2] Streamlines the change in promiscuous mode to only set one AQ required bit. [3] This allows us to keep track of the current state of the flags and also makes it so we can take the most recent netdev->flags promiscuous mode state. [4] This fixes the problem where a change in the netdev->flags can cause IAVF_FLAG_AQ_CONFIGURE_PROMISC_MODE to be set in iavf_set_rx_mode(), but cleared in iavf_set_promiscuous() before the change is ever made via AQ call. Fixes: 47d34839 ("i40evf: Add driver support for promiscuous mode") Signed-off-by: Brett Creeley <brett.creeley@intel.com> Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com> Tested-by: Rafal Romanowski <rafal.romanowski@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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