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| author | Johannes Berg <johannes.berg@intel.com> | 2021-04-11 12:46:25 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2021-04-14 12:07:19 +0300 |
| commit | 6da29d3b42ea8b23251f8312e083a8da2e5ed6eb (patch) | |
| tree | 73767d6f331fc73823d6e9253b90026d7b610e7e /drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | |
| parent | aa1540ca7616b996327abb8cb6f19ee91b34dbe0 (diff) | |
| download | linux-6da29d3b42ea8b23251f8312e083a8da2e5ed6eb.tar.gz linux-6da29d3b42ea8b23251f8312e083a8da2e5ed6eb.tar.bz2 linux-6da29d3b42ea8b23251f8312e083a8da2e5ed6eb.zip | |
iwlwifi: mvm: don't lock mutex in RCU critical section
We cannot lock a mutex while we're in an RCU critical section. At
the same time, we're accessing data structures that are protected
by the mvm->mutex anyway, so just move the entire locking here to
use only that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210411124417.4d27bd36e10e.I1fd8e8fe442c41a5deaa560452b598ed7a60ada5@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c index 34ddef97b099..63d65018d098 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* - * Copyright (C) 2012-2014, 2018-2020 Intel Corporation + * Copyright (C) 2012-2014, 2018-2021 Intel Corporation * Copyright (C) 2013-2015 Intel Mobile Communications GmbH * Copyright (C) 2016-2017 Intel Deutschland GmbH */ @@ -1210,10 +1210,10 @@ static int _iwl_dbgfs_inject_beacon_ie(struct iwl_mvm *mvm, char *bin, int len) IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE)) return -EINVAL; - rcu_read_lock(); + mutex_lock(&mvm->mutex); for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { - vif = iwl_mvm_rcu_dereference_vif_id(mvm, i, true); + vif = iwl_mvm_rcu_dereference_vif_id(mvm, i, false); if (!vif) continue; @@ -1253,18 +1253,16 @@ static int _iwl_dbgfs_inject_beacon_ie(struct iwl_mvm *mvm, char *bin, int len) &beacon_cmd.tim_size, beacon->data, beacon->len); - mutex_lock(&mvm->mutex); iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, sizeof(beacon_cmd)); mutex_unlock(&mvm->mutex); dev_kfree_skb(beacon); - rcu_read_unlock(); return 0; out_err: - rcu_read_unlock(); + mutex_unlock(&mvm->mutex); return -EINVAL; } |