From: Johannes Berg <johannes.berg@intel.com>
Date: Sat, 29 Jan 2022 11:16:16 +0000 (+0200)
Subject: iwlwifi: mvm: align locking in D3 test debugfs
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=06511eed8177ece302d74b9acb25d9e47a82ae7d;p=linux.git

iwlwifi: mvm: align locking in D3 test debugfs

[ Upstream commit 59e1221f470c2e5d2f2d4c95153edd577a7071c5 ]

Since commit a05829a7222e ("cfg80211: avoid holding the RTNL when
calling the driver") we're not only holding the RTNL when going
in and out of suspend, but also the wiphy->mtx. Add that to the
D3 test debugfs in iwlwifi since it's required for various calls
to mac80211.

Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220129105618.fcec0204e162.Ib73bf787ab4d83581de20eb89b1f8dbfcaaad0e3@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index d3013a51a5096..00ca17f3b263c 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
@@ -2499,7 +2499,9 @@ static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
 
 	/* start pseudo D3 */
 	rtnl_lock();
+	wiphy_lock(mvm->hw->wiphy);
 	err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
+	wiphy_unlock(mvm->hw->wiphy);
 	rtnl_unlock();
 	if (err > 0)
 		err = -EINVAL;
@@ -2555,7 +2557,9 @@ static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
 	iwl_fw_dbg_read_d3_debug_data(&mvm->fwrt);
 
 	rtnl_lock();
+	wiphy_lock(mvm->hw->wiphy);
 	__iwl_mvm_resume(mvm, true);
+	wiphy_unlock(mvm->hw->wiphy);
 	rtnl_unlock();
 
 	iwl_mvm_resume_tcm(mvm);