diff options
author | David P <megver83@parabola.nu> | 2018-07-15 15:26:45 -0400 |
---|---|---|
committer | David P <megver83@parabola.nu> | 2018-07-15 15:26:45 -0400 |
commit | e6e6dd11ab4afa23ea245f3ddde4ff96bf3d64e8 (patch) | |
tree | 299825fbd24abea9c5ad6576fe4ac46582bf4078 /libre/linux-libre/0004-mac80211-disable-BHs-preemption-in-ieee80211_tx_cont.patch | |
parent | 9c1e3128b617e05dec356cfdcd90adf9fe26c5b0 (diff) | |
download | abslibre-e6e6dd11ab4afa23ea245f3ddde4ff96bf3d64e8.tar.gz abslibre-e6e6dd11ab4afa23ea245f3ddde4ff96bf3d64e8.tar.bz2 abslibre-e6e6dd11ab4afa23ea245f3ddde4ff96bf3d64e8.zip |
upgpkg: libre/linux-libre 4.17.6_gnu-1
Signed-off-by: David P <megver83@parabola.nu>
Diffstat (limited to 'libre/linux-libre/0004-mac80211-disable-BHs-preemption-in-ieee80211_tx_cont.patch')
-rw-r--r-- | libre/linux-libre/0004-mac80211-disable-BHs-preemption-in-ieee80211_tx_cont.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libre/linux-libre/0004-mac80211-disable-BHs-preemption-in-ieee80211_tx_cont.patch b/libre/linux-libre/0004-mac80211-disable-BHs-preemption-in-ieee80211_tx_cont.patch new file mode 100644 index 000000000..de3385e8d --- /dev/null +++ b/libre/linux-libre/0004-mac80211-disable-BHs-preemption-in-ieee80211_tx_cont.patch @@ -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 + |