Bluetooth: Fix Suspicious RCU usage warnings
The following functions in hci_core are always called with
hdev->lock held. No need to use list_for_each_entry_rcu(), therefore
change the usage of list_for_each_entry_rcu() in these functions
to list_for_each_entry().
hci_link_keys_clear()
hci_smp_ltks_clear()
hci_smp_irks_clear()
hci_blocked_keys_clear()
Warning encountered with CONFIG_PROVE_RCU_LIST:
[ 72.213184] =============================
[ 72.213188] WARNING: suspicious RCU usage
[ 72.213192] 5.6.0-rc1+ #5 Not tainted
[ 72.213195] -----------------------------
[ 72.213198] net/bluetooth/hci_core.c:2288 RCU-list traversed in non-reader section!!
[ 72.213676] =============================
[ 72.213679] WARNING: suspicious RCU usage
[ 72.213683] 5.6.0-rc1+ #5 Not tainted
[ 72.213685] -----------------------------
[ 72.213689] net/bluetooth/hci_core.c:2298 RCU-list traversed in non-reader section!!
[ 72.214195] =============================
[ 72.214198] WARNING: suspicious RCU usage
[ 72.214201] 5.6.0-rc1+ #5 Not tainted
[ 72.214204] -----------------------------
[ 72.214208] net/bluetooth/hci_core.c:2308 RCU-list traversed in non-reader section!!
[ 333.456972] =============================
[ 333.456979] WARNING: suspicious RCU usage
[ 333.457001] 5.6.0-rc1+ #5 Not tainted
[ 333.457007] -----------------------------
[ 333.457014] net/bluetooth/hci_core.c:2318 RCU-list traversed in non-reader section!!
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
1 file changed