On Rx path, NIC fills Rx descriptor with data pertains to received packet.
A single descriptor consists of multiple words. Word1 has the bit that indicates readiness of descriptor for software to use. So word1 should be loaded before other words. On architectures with weaker memory ordering, barrier is needed to ensure the ordering of loads. This patch set fixed the risk on both scalar path and aarch64 vector path. Ruifeng Wang (2): net/i40e: fix risk in Rx descriptor read in NEON vector path net/i40e: fix risk in Rx descriptor read in scalar path drivers/net/i40e/i40e_rxtx.c | 12 ++++++++++++ drivers/net/i40e/i40e_rxtx_vec_neon.c | 8 ++++++++ 2 files changed, 20 insertions(+) -- 2.25.1
