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authorStefan Richter <stefanr@s5r6.in-berlin.de>2016-11-02 21:09:44 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2018-01-13 16:37:24 +0100
commit4adf7bf7bbaefe71133305193c25d32863115dda (patch)
tree78f53781df9ee62acb24d40ab5c25053ee67eef3 /drivers/firewire
parentbebc6082da0a9f5d47a1ea2edc099bf671058bd4 (diff)
firewire: net: max MTU off by one
The latest max_mtu patch missed that datagram_size is actually one less than the datagram's Total Length. Fixes: 357f4aae859b ("firewire: net: really fix maximum possible MTU") Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/net.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c
index 242359c2d1f1..60e75e6d9104 100644
--- a/drivers/firewire/net.c
+++ b/drivers/firewire/net.c
@@ -1480,9 +1480,14 @@ static int fwnet_probe(struct fw_unit *unit,
goto out;
dev->local_fifo = dev->handler.offset;
+ /*
+ * default MTU: RFC 2734 cl. 4, RFC 3146 cl. 4
+ * maximum MTU: RFC 2734 cl. 4.2, fragment encapsulation header's
+ * maximum possible datagram_size + 1 = 0xfff + 1
+ */
net->mtu = 1500U;
net->min_mtu = ETH_MIN_MTU;
- net->max_mtu = 0xfff;
+ net->max_mtu = 4096U;
/* Set our hardware address while we're at it */
ha = (union fwnet_hwaddr *)net->dev_addr;

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