netdev - [PATCH net-next] r8169: improve max jumbo packet size definition

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Message-ID: <5571405c-3b2a-8669-320d-daa21f4c279c@gmail.com>
Date:   Tue, 28 Apr 2020 22:54:12 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next] r8169: improve max jumbo packet size definition

Sync definition of max jumbo packet size with vendor driver and reserve
22 bytes for VLAN ethernet header plus checksum.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 68d525556..8966687aa 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -87,10 +87,10 @@
 #define RTL_R16(tp, reg)		readw(tp->mmio_addr + (reg))
 #define RTL_R32(tp, reg)		readl(tp->mmio_addr + (reg))
 
-#define JUMBO_4K	(4*1024 - ETH_HLEN - 2)
-#define JUMBO_6K	(6*1024 - ETH_HLEN - 2)
-#define JUMBO_7K	(7*1024 - ETH_HLEN - 2)
-#define JUMBO_9K	(9*1024 - ETH_HLEN - 2)
+#define JUMBO_4K	(4 * SZ_1K - VLAN_ETH_HLEN - ETH_FCS_LEN)
+#define JUMBO_6K	(6 * SZ_1K - VLAN_ETH_HLEN - ETH_FCS_LEN)
+#define JUMBO_7K	(7 * SZ_1K - VLAN_ETH_HLEN - ETH_FCS_LEN)
+#define JUMBO_9K	(9 * SZ_1K - VLAN_ETH_HLEN - ETH_FCS_LEN)
 
 static const struct {
 	const char *name;
-- 
2.26.2