ice: xsk: check if Rx ring was filled up to the end
__ice_alloc_rx_bufs_zc() checks if a number of the descriptors to be allocated would cause the ring wrap. In that case, driver will issue two calls to xsk_buff_alloc_batch() - one that will fill the ring up to the end and the second one that will start with filling descriptors from the beginning of the ring. ice_fill_rx_descs() is a wrapper for taking care of what xsk_buff_alloc_batch() gave back to the driver. It works in a best effort approach, so for example when driver asks for 64 buffers, ice_fill_rx_descs() could assign only 32. Such case needs to be checked when ring is being filled up to the end, because in that situation ntu might not reached the end of the ring. Fix the ring wrap by checking if nb_buffs_extra has the expected value. If not, bump ntu and go directly to tail update. Fixes: 3876ff52 ("ice: xsk: Handle SW XDP ring wrap and bump tail more often") Signed-off-by:Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by:
Maciej Fijalkowski <maciej.fijalkowski@intel.com> Tested-by:
Shwetha Nagaraju <Shwetha.nagaraju@intel.com> Signed-off-by:
Tony Nguyen <anthony.l.nguyen@intel.com>
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