Author: hselasky Date: Mon Dec 14 09:46:46 2015 New Revision: 292185 URL: https://svnweb.freebsd.org/changeset/base/292185
Log: 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: r...@ci.com.au PR: 205050 Modified: stable/10/sys/dev/usb/net/if_smsc.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/usb/net/if_smsc.c ============================================================================== --- stable/10/sys/dev/usb/net/if_smsc.c Mon Dec 14 09:42:39 2015 (r292184) +++ stable/10/sys/dev/usb/net/if_smsc.c Mon Dec 14 09:46:46 2015 (r292185) @@ -1686,7 +1686,7 @@ smsc_attach_post_sub(struct usb_ether *u /* 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?) _______________________________________________ svn-src-stable-10@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-stable-10 To unsubscribe, send any mail to "svn-src-stable-10-unsubscr...@freebsd.org"