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| author | hselasky <hselasky@FreeBSD.org> | 2015-12-14 09:46:46 +0000 |
|---|---|---|
| committer | hselasky <hselasky@FreeBSD.org> | 2015-12-14 09:46:46 +0000 |
| commit | 832cab9e62e4c2e5cb25184aa42aefad051dffa8 (patch) | |
| tree | c5275afda90706456bb37f981077988d8f4624e7 /sys/dev/usb | |
| parent | b15337b0d4d1752a44ea30bd9e83b0d87d69b618 (diff) | |
| download | FreeBSD-src-832cab9e62e4c2e5cb25184aa42aefad051dffa8.zip FreeBSD-src-832cab9e62e4c2e5cb25184aa42aefad051dffa8.tar.gz | |
MFC r291953:
When setting up VLANs on a Raspberry Pi ethernet port, the MTU drops
from 1500 to 1496 bytes. The MTU should remain at 1500, extending the
frame size as per IEEE 802.3. Adding IFCAP_VLAN_MTU to the
if_capabilities field in the smsc driver solves the problem. The
datasheet for the LAN9512 chip, section 3.2.3 states that the chip
supports the extended frame.
Submitted by: rpp@ci.com.au
PR: 205050
Diffstat (limited to 'sys/dev/usb')
| -rw-r--r-- | sys/dev/usb/net/if_smsc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/usb/net/if_smsc.c b/sys/dev/usb/net/if_smsc.c index f009183..c8f2202 100644 --- a/sys/dev/usb/net/if_smsc.c +++ b/sys/dev/usb/net/if_smsc.c @@ -1686,7 +1686,7 @@ smsc_attach_post_sub(struct usb_ether *ue) /* The chip supports TCP/UDP checksum offloading on TX and RX paths, however * currently only RX checksum is supported in the driver (see top of file). */ - ifp->if_capabilities |= IFCAP_RXCSUM; + ifp->if_capabilities |= IFCAP_RXCSUM | IFCAP_VLAN_MTU; ifp->if_hwassist = 0; /* TX checksuming is disabled (for now?) |
