Date: Mon, 7 Dec 2015 18:55:33 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r291953 - head/sys/dev/usb/net Message-ID: <201512071855.tB7ItXMb046156@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hselasky Date: Mon Dec 7 18:55:33 2015 New Revision: 291953 URL: https://svnweb.freebsd.org/changeset/base/291953 Log: 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 MFC after: 1 week PR: 205050 Modified: head/sys/dev/usb/net/if_smsc.c Modified: head/sys/dev/usb/net/if_smsc.c ============================================================================== --- head/sys/dev/usb/net/if_smsc.c Mon Dec 7 18:45:55 2015 (r291952) +++ head/sys/dev/usb/net/if_smsc.c Mon Dec 7 18:55:33 2015 (r291953) @@ -1707,7 +1707,7 @@ 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?)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201512071855.tB7ItXMb046156>