[PATCH 5.17 0559/1126] iwlwifi: mvm: align locking in D3 test debugfs

Greg Kroah-Hartman
2022-04-05T08:22:06Z

From: Johannes Berg <johannes.berg@intel.com>

[ 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>
---
drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index b400867e94f0..3f284836e707 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
@@ -2704,7 +2704,9 @@ 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;
@@ -2760,7 +2762,9 @@ 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);
--
2.34.1