Author: hselasky
Date: Fri Feb 1 07:26:25 2013
New Revision: 246196
URL: http://svnweb.freebsd.org/changeset/base/246196
Log:
Fix for hardware checksum offloading in SMSC driver.
This also fixes IPv6 support for this particular hardware.
Submitted by: Daisuke Aoyama
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 Fri Feb 1 07:19:19 2013
(r246195)
+++ head/sys/dev/usb/net/if_smsc.c Fri Feb 1 07:26:25 2013
(r246196)
@@ -1009,6 +1009,10 @@ smsc_bulk_read_callback(struct usb_xfer
/* Check if RX TCP/UDP checksumming is being
offloaded */
if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) {
+
+ struct ether_header *eh;
+
+ eh = mtod(m, struct ether_header *);
/* Remove the extra 2 bytes of the csum
*/
pktlen -= 2;
@@ -1020,8 +1024,10 @@ smsc_bulk_read_callback(struct usb_xfer
* the padding bytes as well. Therefore
to be safe we
* ignore the H/W csum on frames less
than or equal to
* 64 bytes.
+ *
+ * Ignore H/W csum for non-IPv4 packets.
*/
- if (pktlen > ETHER_MIN_LEN) {
+ if (be16toh(eh->ether_type) ==
ETHERTYPE_IP && pktlen > ETHER_MIN_LEN) {
/* Indicate the UDP/TCP csum
has been calculated */
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID;
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