linux-kernel - [PATCH 4.4 222/312] mlxsw: switchx2: Fix misuse of hard_header

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Message-Id: <20200508123140.073297562@linuxfoundation.org>
Date:   Fri,  8 May 2020 14:33:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yotam Gigi <yotamg@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Jiri Pirko <jiri@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 222/312] mlxsw: switchx2: Fix misuse of hard_header_len

From: Yotam Gigi <yotamg@...lanox.com>

commit 251d41c58b765f00d73b1b4230cad256e25f2735 upstream.

In order to specify that the mlxsw switchx2 driver needs additional
headroom for packets, there have been use of the hard_header_len field of
the netdevice struct.

This commit changes that to use needed_headroom instead, as this is the
correct way to do that.

Fixes: 31557f0f9755 ("mlxsw: Introduce Mellanox SwitchX-2 ASIC support")
Signed-off-by: Yotam Gigi <yotamg@...lanox.com>
Acked-by: Ido Schimmel <idosch@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/mellanox/mlxsw/switchx2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
@@ -993,7 +993,7 @@ static int mlxsw_sx_port_create(struct m
 	/* Each packet needs to have a Tx header (metadata) on top all other
 	 * headers.
 	 */
-	dev->hard_header_len += MLXSW_TXHDR_LEN;
+	dev->needed_headroom = MLXSW_TXHDR_LEN;

 	err = mlxsw_sx_port_module_check(mlxsw_sx_port, &usable);
 	if (err) {