[PATCH 3/6] net: mvneta: move mvneta_run_xdp after descriptors processing

[Lorenzo Bianconi]

Move mvneta_run_xdp routine after all descriptor processing. This is a
preliminary patch to enable multi-buffers and JUMBO frames support for
XDP

Signed-off-by: Lorenzo Bianconi <lore...@kernel.org>
---
 drivers/net/ethernet/marvell/mvneta.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c 
b/drivers/net/ethernet/marvell/mvneta.c
index 678f90ccf271..fbf88e524210 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2231,12 +2231,11 @@ mvneta_run_xdp(struct mvneta_port *pp, struct 
mvneta_rx_queue *rxq,
        return ret;
 }
 
-static int
+static void
 mvneta_swbm_rx_frame(struct mvneta_port *pp,
                     struct mvneta_rx_desc *rx_desc,
                     struct mvneta_rx_queue *rxq,
                     struct xdp_buff *xdp,
-                    struct bpf_prog *xdp_prog,
                     struct page *page,
                     struct mvneta_stats *stats)
 {
@@ -2245,7 +2244,6 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp,
        struct net_device *dev = pp->dev;
        enum dma_data_direction dma_dir;
        struct skb_shared_info *sinfo;
-       int ret = 0;
 
        if (MVNETA_SKB_SIZE(rx_desc->data_size) > PAGE_SIZE) {
                len = MVNETA_MAX_RX_BUF_SIZE;
@@ -2271,13 +2269,8 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp,
        sinfo = xdp_get_shared_info_from_buff(xdp);
        sinfo->nr_frags = 0;
 
-       if (xdp_prog)
-               ret = mvneta_run_xdp(pp, rxq, xdp_prog, xdp, stats);
-
        rxq->left_size = rx_desc->data_size - len;
        rx_desc->buf_phys_addr = 0;
-
-       return ret;
 }
 
 static void
@@ -2384,20 +2377,15 @@ static int mvneta_rx_swbm(struct napi_struct *napi,
                rxq->refill_num++;
 
                if (rx_status & MVNETA_RXD_FIRST_DESC) {
-                       int err;
-
                        /* Check errors only for FIRST descriptor */
                        if (rx_status & MVNETA_RXD_ERR_SUMMARY) {
                                mvneta_rx_error(pp, rx_desc);
                                goto next;
                        }
 
-                       err = mvneta_swbm_rx_frame(pp, rx_desc, rxq, &xdp_buf,
-                                                  xdp_prog, page, &ps);
-                       if (err)
-                               continue;
-
                        desc_status = rx_desc->status;
+                       mvneta_swbm_rx_frame(pp, rx_desc, rxq, &xdp_buf, page,
+                                            &ps);
                } else {
                        if (unlikely(!xdp_buf.data_hard_start))
                                continue;
@@ -2416,6 +2404,10 @@ static int mvneta_rx_swbm(struct napi_struct *napi,
                        goto next;
                }
 
+               if (xdp_prog &&
+                   mvneta_run_xdp(pp, rxq, xdp_prog, &xdp_buf, &ps))
+                       goto next;
+
                skb = mvneta_swbm_build_skb(pp, rxq, &xdp_buf, desc_status);
                if (IS_ERR(skb)) {
                        struct mvneta_pcpu_stats *stats = 
this_cpu_ptr(pp->stats);
-- 
2.26.2