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authorAmol Grover <frextrite@gmail.com>2020-02-19 12:11:04 +0300
committerJohannes Berg <johannes.berg@intel.com>2020-02-21 14:11:30 +0300
commit3ee9306b353bdd0c0cd7cd3a549233e1ad44b608 (patch)
tree6c53a398806c2da8365b3aa31e05977d29288f50 /net/wireless/scan.c
parent92df9f8a745ee9b8cc250514272345cb2e74e7ef (diff)
downloadlinux-3ee9306b353bdd0c0cd7cd3a549233e1ad44b608.tar.xz
cfg80211: Pass lockdep expression to RCU lists
rdev->sched_scan_req_list maybe traversed using list_for_each_entry_rcu outside an RCU read-side critical section but under the protection of rtnl_mutex. Hence, add corresponding lockdep expression to silence false-positive warnings, and harden RCU lists. Signed-off-by: Amol Grover <frextrite@gmail.com> Link: https://lore.kernel.org/r/20200219091102.10709-1-frextrite@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/scan.c')
-rw-r--r--net/wireless/scan.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index aef240fdf8df..7f1af8f347b1 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -556,9 +556,8 @@ cfg80211_find_sched_scan_req(struct cfg80211_registered_device *rdev, u64 reqid)
{
struct cfg80211_sched_scan_request *pos;
- WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_rtnl_is_held());
-
- list_for_each_entry_rcu(pos, &rdev->sched_scan_req_list, list) {
+ list_for_each_entry_rcu(pos, &rdev->sched_scan_req_list, list,
+ lockdep_rtnl_is_held()) {
if (pos->reqid == reqid)
return pos;
}