From: Daniel Hellstrom <daniel@gaisler.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, kristoffer@gaisler.com, eric.dumazet@gmail.com
Subject: [PATCH 2/2 v2] GRETH: avoid overwrite IP-stack's IP-frags checksum
Date: Fri, 9 Sep 2011 17:17:54 +0200 [thread overview]
Message-ID: <1315581474-4430-1-git-send-email-daniel@gaisler.com> (raw)
The GRETH GBIT core does not do checksum offloading for IP
segmentation. This patch adds a check in the xmit function to
determine if the stack has calculated the checksum for us.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
---
drivers/net/greth.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/greth.c b/drivers/net/greth.c
index 22e24a3..6775c24 100644
--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -489,7 +489,8 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
if (nr_frags != 0)
status = GRETH_TXBD_MORE;
- status |= GRETH_TXBD_CSALL;
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ status |= GRETH_TXBD_CSALL;
status |= skb_headlen(skb) & GRETH_BD_LEN;
if (greth->tx_next == GRETH_TXBD_NUM_MASK)
status |= GRETH_BD_WR;
@@ -512,7 +513,9 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
greth->tx_skbuff[curr_tx] = NULL;
bdp = greth->tx_bd_base + curr_tx;
- status = GRETH_TXBD_CSALL | GRETH_BD_EN;
+ status = GRETH_BD_EN;
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ status |= GRETH_TXBD_CSALL;
status |= frag->size & GRETH_BD_LEN;
/* Wrap around descriptor ring */
--
1.5.4
next reply other threads:[~2011-09-09 15:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-09 15:17 Daniel Hellstrom [this message]
2011-09-20 19:16 ` [PATCH 2/2 v2] GRETH: avoid overwrite IP-stack's IP-frags checksum David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1315581474-4430-1-git-send-email-daniel@gaisler.com \
--to=daniel@gaisler.com \
--cc=davem@davemloft.net \
--cc=eric.dumazet@gmail.com \
--cc=kristoffer@gaisler.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).