[PATCH 2/2] 8139too: Allow using the largest possible MTU

From: Alban Bedel
Date: Sat Nov 08 2014 - 06:49:11 EST


This driver allows MTU up to 1518 bytes which is not enought to run
batman-adv. Simply raise the maximum packet size up to the maximum
allowed by the transmit descriptor, 1792 bytes, giving a maximum MTU
of 1774 bytes.

Signed-off-by: Alban Bedel <albeu@xxxxxxx>
---
drivers/net/ethernet/realtek/8139too.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/realtek/8139too.c b/drivers/net/ethernet/realtek/8139too.c
index 8387de9..e157541 100644
--- a/drivers/net/ethernet/realtek/8139too.c
+++ b/drivers/net/ethernet/realtek/8139too.c
@@ -183,7 +183,7 @@ static int debug = -1;
#define NUM_TX_DESC 4

/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
-#define MAX_ETH_FRAME_SIZE 1536
+#define MAX_ETH_FRAME_SIZE 1792

/* max supported payload size */
#define MAX_ETH_DATA_SIZE (MAX_ETH_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN)
--
2.0.0

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