diff mbox series

[bpf-next,v3,04/11] bpf: make bnxt compatible w/ bpf_xdp_adjust_tail

Message ID 20180418044223.17685-5-tehnerd@tehnerd.com
State Accepted, archived
Delegated to: BPF Maintainers
Headers show
Series introduction of bpf_xdp_adjust_tail | expand

Commit Message

Nikita V. Shirokov April 18, 2018, 4:42 a.m. UTC 
w/ bpf_xdp_adjust_tail helper xdp's data_end pointer could be changed as
well (only "decrease" of pointer's location is going to be supported).
changing of this pointer will change packet's size.
for bnxt driver we will just calculate packet's length unconditionally

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Michael Chan April 18, 2018, 5:39 p.m. UTC | #1 
On Tue, Apr 17, 2018 at 9:42 PM, Nikita V. Shirokov <tehnerd@tehnerd.com> wrote:
> w/ bpf_xdp_adjust_tail helper xdp's data_end pointer could be changed as
> well (only "decrease" of pointer's location is going to be supported).
> changing of this pointer will change packet's size.
> for bnxt driver we will just calculate packet's length unconditionally
>
> Acked-by: Alexei Starovoitov <ast@kernel.org>
> Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>

Acked-by: Michael Chan <michael.chan@broadcom.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
index 1389ab5e05df..1f0e872d0667 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
@@ -113,10 +113,10 @@  bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
 	if (tx_avail != bp->tx_ring_size)
 		*event &= ~BNXT_RX_EVENT;
 
+	*len = xdp.data_end - xdp.data;
 	if (orig_data != xdp.data) {
 		offset = xdp.data - xdp.data_hard_start;
 		*data_ptr = xdp.data_hard_start + offset;
-		*len = xdp.data_end - xdp.data;
 	}
 	switch (act) {
 	case XDP_PASS: