diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2018-09-17 17:35:59 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-09-17 09:10:25 -0700 |
| commit | f231dc9dbd789b0f98a15941e3cebedb4ad72ad5 (patch) | |
| tree | a5c9269ad860d6a4ef29a74338db39fa642106cd /drivers/s390 | |
| parent | 40e6a2258492ee7082294be85eaca2b074241f23 (diff) | |
s390/qeth: limit csum offload erratum to L3 devices
Combined L3+L4 csum offload is only required for some L3 HW. So for
L2 devices, don't offload the IP header csum calculation.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reference-ID: JUP 394553
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 5 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 5 |
2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 0857b1286660..b47fb95a49e9 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -892,11 +892,6 @@ static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, int ipv) if ((ipv == 4 && ip_hdr(skb)->protocol == IPPROTO_UDP) || (ipv == 6 && ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)) *flags |= QETH_HDR_EXT_UDP; - if (ipv == 4) { - /* some HW requires combined L3+L4 csum offload: */ - *flags |= QETH_HDR_EXT_CSUM_HDR_REQ; - ip_hdr(skb)->check = 0; - } } static inline void qeth_put_buffer_pool_entry(struct qeth_card *card, diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 1d92584e01b3..d4a967077279 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -2055,6 +2055,11 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, if (!skb_is_gso(skb) && skb->ip_summed == CHECKSUM_PARTIAL) { qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv); + /* some HW requires combined L3+L4 csum offload: */ + if (ipv == 4) { + hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ; + ip_hdr(skb)->check = 0; + } if (card->options.performance_stats) card->perf_stats.tx_csum++; } |