iwlwifi: tt: move ucode_loaded check under mutex

[ Upstream commit d9954405758a0cbbe258d9b4d4dc12a06fa48a28 ]

The ucode_loaded check should be under the mutex, since it can
otherwise change state after we looked at it and before we got
the mutex. Fix that.

Fixes: 5c89e7bc557e ("iwlwifi: mvm: add registration to cooling device")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index bec7d9c46087d3c8fed48d5858f4f116797eceed..c5203568a47ac171c6105d1a233cf8e37ed742e9 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -790,11 +790,13 @@ static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
        struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
        int ret;
 
-       if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR))
-               return -EIO;
-
        mutex_lock(&mvm->mutex);
 
+       if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) {
+               ret = -EIO;
+               goto unlock;
+       }
+
        if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
                ret = -EINVAL;
                goto unlock;