This is a note to let you know that I've just added the patch titled
nl80211: Reset split_start when netlink skb is exhausted
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nl80211-reset-split_start-when-netlink-skb-is-exhausted.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f12cb2893069495726c21a4b0178705dacfecfe0 Mon Sep 17 00:00:00 2001
From: Pontus Fuchs <pontus.fuchs@xxxxxxxxx>
Date: Thu, 16 Jan 2014 15:00:40 +0100
Subject: nl80211: Reset split_start when netlink skb is exhausted
From: Pontus Fuchs <pontus.fuchs@xxxxxxxxx>
commit f12cb2893069495726c21a4b0178705dacfecfe0 upstream.
When the netlink skb is exhausted split_start is left set. In the
subsequent retry, with a larger buffer, the dump is continued from the
failing point instead of from the beginning.
This was causing my rt28xx based USB dongle to now show up when
running "iw list" with an old iw version without split dump support.
Fixes: 3713b4e364ef ("nl80211: allow splitting wiphy information in dumps")
Signed-off-by: Pontus Fuchs <pontus.fuchs@xxxxxxxxx>
[avoid the entire workaround when state->split is set]
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/wireless/nl80211.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1655,9 +1655,10 @@ static int nl80211_dump_wiphy(struct sk_
* We can then retry with the larger buffer.
*/
if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
- !skb->len &&
+ !skb->len && !state->split &&
cb->min_dump_alloc < 4096) {
cb->min_dump_alloc = 4096;
+ state->split_start = 0;
rtnl_unlock();
return 1;
}
Patches currently in stable-queue which might be from pontus.fuchs@xxxxxxxxx are
queue-3.12/nl80211-reset-split_start-when-netlink-skb-is-exhausted.patch
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