From: frank.blaschka@de.ibm.com
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org,
Ursula Braun <ursula.braun@de.ibm.com>
Subject: [patch 4/5] [PATCH] qeth: omit upstream checksumming for HiperSockets
Date: Wed, 20 May 2009 09:38:40 +0200 [thread overview]
Message-ID: <20090520073928.073471000@de.ibm.com> (raw)
In-Reply-To: 20090520073836.897878000@de.ibm.com
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[-- Type: text/plain, Size: 2392 bytes --]
From: Ursula Braun <ursula.braun@de.ibm.com>
For HiperSocket devices receive-path checksumming is not required.
Thus NO_CHECKSUMMING is used as default for HiperSocket interfaces.
For layer3 devices configured with NO_CHECKSUMMING received skbs
should have set their ip_summed field to CHECKSUM_UNNECESSARY.
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
---
drivers/s390/net/qeth_core_main.c | 2 ++
drivers/s390/net/qeth_l3_main.c | 20 +++++++++++++-------
2 files changed, 15 insertions(+), 7 deletions(-)
diff -urpN linux-2.6/drivers/s390/net/qeth_core_main.c linux-2.6-patched/drivers/s390/net/qeth_core_main.c
--- linux-2.6/drivers/s390/net/qeth_core_main.c 2009-05-20 08:56:25.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/qeth_core_main.c 2009-05-20 08:56:43.000000000 +0200
@@ -1140,6 +1140,8 @@ static int qeth_setup_card(struct qeth_c
card->ipato.enabled = 0;
card->ipato.invert4 = 0;
card->ipato.invert6 = 0;
+ if (card->info.type == QETH_CARD_TYPE_IQD)
+ card->options.checksum_type = NO_CHECKSUMMING;
/* init QDIO stuff */
qeth_init_qdio_info(card);
return 0;
diff -urpN linux-2.6/drivers/s390/net/qeth_l3_main.c linux-2.6-patched/drivers/s390/net/qeth_l3_main.c
--- linux-2.6/drivers/s390/net/qeth_l3_main.c 2009-05-20 08:56:42.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/qeth_l3_main.c 2009-05-20 08:56:43.000000000 +0200
@@ -1920,16 +1920,22 @@ static inline __u16 qeth_l3_rebuild_skb(
hdr->hdr.l3.vlan_id : *((u16 *)&hdr->hdr.l3.dest_addr[12]);
}
- skb->ip_summed = card->options.checksum_type;
- if (card->options.checksum_type == HW_CHECKSUMMING) {
+ switch (card->options.checksum_type) {
+ case SW_CHECKSUMMING:
+ skb->ip_summed = CHECKSUM_NONE;
+ break;
+ case NO_CHECKSUMMING:
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ break;
+ case HW_CHECKSUMMING:
if ((hdr->hdr.l3.ext_flags &
- (QETH_HDR_EXT_CSUM_HDR_REQ |
- QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
- (QETH_HDR_EXT_CSUM_HDR_REQ |
- QETH_HDR_EXT_CSUM_TRANSP_REQ))
+ (QETH_HDR_EXT_CSUM_HDR_REQ |
+ QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
+ (QETH_HDR_EXT_CSUM_HDR_REQ |
+ QETH_HDR_EXT_CSUM_TRANSP_REQ))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
- skb->ip_summed = SW_CHECKSUMMING;
+ skb->ip_summed = CHECKSUM_NONE;
}
return vlan_id;
next prev parent reply other threads:[~2009-05-20 7:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-20 7:38 [patch 0/5] s390: qeth/ctcm patches for 2.6.31 frank.blaschka
2009-05-20 7:38 ` [patch 1/5] [PATCH] qeth: avoid crash after detach of replugged device frank.blaschka
2009-05-20 7:38 ` [patch 2/5] [PATCH] ctcm: avoid crash in ctcm_remove_device frank.blaschka
2009-05-20 7:38 ` [patch 3/5] [PATCH] qeth: support z/VM VSWITCH Port Isolation frank.blaschka
2009-05-20 7:38 ` frank.blaschka [this message]
2009-05-20 7:38 ` [patch 5/5] [PATCH] qeth: Clear SBALF15 in any case for output buffers frank.blaschka
2009-05-21 0:37 ` [patch 0/5] s390: qeth/ctcm patches for 2.6.31 David Miller
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