netdev - [net-next 10/15] net/mlx5e: Unindent the else-block in mlx5e_xmit_xdp

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Date:   Fri, 18 Mar 2022 13:52:43 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Maxim Mikityanskiy <maximmi@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 10/15] net/mlx5e: Unindent the else-block in mlx5e_xmit_xdp_buff

From: Maxim Mikityanskiy <maximmi@...dia.com>

The next commit will add more indentation levels to mlx5e_xmit_xdp_buff.
To keep indentation minimal, unindent the else-block of the if-statement
by doing an early return.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  | 34 +++++++++++--------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index 52e0f0028c35..368e54949614 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -101,24 +101,30 @@ mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq,
 		xdptxd.dma_addr     = dma_addr;
 		xdpi.frame.xdpf     = xdpf;
 		xdpi.frame.dma_addr = dma_addr;
-	} else {
-		/* Driver assumes that xdp_convert_buff_to_frame returns
-		 * an xdp_frame that points to the same memory region as
-		 * the original xdp_buff. It allows to map the memory only
-		 * once and to use the DMA_BIDIRECTIONAL mode.
-		 */
-
-		xdpi.mode = MLX5E_XDP_XMIT_MODE_PAGE;
 
-		dma_addr = page_pool_get_dma_addr(page) + (xdpf->data - (void *)xdpf);
-		dma_sync_single_for_device(sq->pdev, dma_addr, xdptxd.len,
-					   DMA_TO_DEVICE);
+		if (unlikely(!INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe,
+					      mlx5e_xmit_xdp_frame, sq, &xdptxd, NULL, 0)))
+			return false;
 
-		xdptxd.dma_addr = dma_addr;
-		xdpi.page.rq    = rq;
-		xdpi.page.page = page;
+		mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, &xdpi);
+		return true;
 	}
 
+	/* Driver assumes that xdp_convert_buff_to_frame returns an xdp_frame
+	 * that points to the same memory region as the original xdp_buff. It
+	 * allows to map the memory only once and to use the DMA_BIDIRECTIONAL
+	 * mode.
+	 */
+
+	xdpi.mode = MLX5E_XDP_XMIT_MODE_PAGE;
+
+	dma_addr = page_pool_get_dma_addr(page) + (xdpf->data - (void *)xdpf);
+	dma_sync_single_for_device(sq->pdev, dma_addr, xdptxd.len, DMA_TO_DEVICE);
+
+	xdptxd.dma_addr = dma_addr;
+	xdpi.page.rq = rq;
+	xdpi.page.page = page;
+
 	if (unlikely(!INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe,
 				      mlx5e_xmit_xdp_frame, sq, &xdptxd, NULL, 0)))
 		return false;
-- 
2.35.1