missing patch
This commit is contained in:
parent
f80d73be85
commit
65bd08a167
@ -0,0 +1,46 @@
|
|||||||
|
From 32a72bee7a275f47c235fdb36249703c892ce8d8 Mon Sep 17 00:00:00 2001
|
||||||
|
Message-Id: <32a72bee7a275f47c235fdb36249703c892ce8d8.1531335939.git.jan.steffens@gmail.com>
|
||||||
|
In-Reply-To: <a2d2476ffec7d988b1a5396586869570e0d6f9d8.1531335939.git.jan.steffens@gmail.com>
|
||||||
|
References: <a2d2476ffec7d988b1a5396586869570e0d6f9d8.1531335939.git.jan.steffens@gmail.com>
|
||||||
|
From: Denis Kenzior <denkenz@gmail.com>
|
||||||
|
Date: Tue, 19 Jun 2018 10:39:50 -0500
|
||||||
|
Subject: [PATCH 4/4] mac80211: disable BHs/preemption in
|
||||||
|
ieee80211_tx_control_port()
|
||||||
|
|
||||||
|
On pre-emption enabled kernels the following print was being seen due to
|
||||||
|
missing local_bh_disable/local_bh_enable calls. mac80211 assumes that
|
||||||
|
pre-emption is disabled in the data path.
|
||||||
|
|
||||||
|
BUG: using smp_processor_id() in preemptible [00000000] code: iwd/517
|
||||||
|
caller is __ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
|
||||||
|
[...]
|
||||||
|
Call Trace:
|
||||||
|
dump_stack+0x5c/0x80
|
||||||
|
check_preemption_disabled.cold.0+0x46/0x51
|
||||||
|
__ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
|
||||||
|
|
||||||
|
Fixes: 911806491425 ("mac80211: Add support for tx_control_port")
|
||||||
|
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
|
||||||
|
[commit message rewrite, fixes tag]
|
||||||
|
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
|
||||||
|
---
|
||||||
|
net/mac80211/tx.c | 2 ++
|
||||||
|
1 file changed, 2 insertions(+)
|
||||||
|
|
||||||
|
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
|
||||||
|
index 05a265cd573d..7404a5114597 100644
|
||||||
|
--- a/net/mac80211/tx.c
|
||||||
|
+++ b/net/mac80211/tx.c
|
||||||
|
@@ -4800,7 +4800,9 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
|
||||||
|
skb_reset_network_header(skb);
|
||||||
|
skb_reset_mac_header(skb);
|
||||||
|
|
||||||
|
+ local_bh_disable();
|
||||||
|
__ieee80211_subif_start_xmit(skb, skb->dev, flags);
|
||||||
|
+ local_bh_enable();
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
--
|
||||||
|
2.18.0
|
||||||
|
|
Loading…
Reference in New Issue
Block a user