mac80211: fix the skb cloned check in the tx path
authorFelix Fietkau <nbd@openwrt.org>
Mon, 7 Feb 2011 11:05:00 +0000 (12:05 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 7 Feb 2011 21:02:14 +0000 (16:02 -0500)
commitfc7c976dc7a565213393ce700d4a6105f037bf20
treeab7b069f25f0d6ddce88be4a1c898d3101ed1c09
parent3dd823e6b86407aed1a025041d8f1df77e43a9c8
mac80211: fix the skb cloned check in the tx path

Using skb_header_cloned to check if it's safe to write to the skb is not
enough - mac80211 also touches the tailroom of the skb.
Initially this check was only used to increase a counter, however this
commit changed the code to also skip skb data reallocation if no extra
head/tailroom was needed:

commit 4cd06a344db752f513437138953af191cbe9a691
mac80211: skip unnecessary pskb_expand_head calls

It added a regression at least with iwl3945, which is fixed by this patch.

Reported-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Tested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/mac80211/tx.c