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[4.2.y-ckt,stable] Patch "IB/IPoIB: Do not set skb truesize since using one linearskb" has been added to the 4.2.y-ckt tree

Message ID 1457390208-5385-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa March 7, 2016, 10:36 p.m. UTC 
This is a note to let you know that I have just added a patch titled

    IB/IPoIB: Do not set skb truesize since using one linearskb

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt5.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

From c557abbd9bebfdd71b0b766733aa89d342d74b8c Mon Sep 17 00:00:00 2001
From: Carol L Soto <clsoto@linux.vnet.ibm.com>
Date: Wed, 3 Feb 2016 15:55:37 -0500
Subject: IB/IPoIB: Do not set skb truesize since using one linearskb

commit bb6a777369449d15a4a890306d2f925cae720e1c upstream.

We are seeing this warning: at net/core/skbuff.c:4174
and before commit a44878d10063 ("IB/ipoib: Use one linear skb in RX flow")
skb truesize was not being set when ipoib was using just one skb.
Removing this line avoids the warning when running tcp tests like iperf.

Fixes: a44878d10063 ("IB/ipoib: Use one linear skb in RX flow")
Signed-off-by: Carol L Soto <clsoto@linux.vnet.ibm.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/infiniband/ulp/ipoib/ipoib_ib.c | 2 --
 1 file changed, 2 deletions(-)

--
2.7.0
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Patch

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index d266667..b5a851f 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -245,8 +245,6 @@  static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
 	skb_reset_mac_header(skb);
 	skb_pull(skb, IPOIB_ENCAP_LEN);

-	skb->truesize = SKB_TRUESIZE(skb->len);
-
 	++dev->stats.rx_packets;
 	dev->stats.rx_bytes += skb->len;