[PATCH] wifi: ath12k: Fix locking in error paths

[Bart Van Assche <bvanassche@acm.org>]

If ag->mutex has been locked, unlock it before returning. If it has not
been locked, do not unlock it before returning. These bugs have been
detected by the Clang thread-safety analyzer.

Cc: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Cc: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Fixes: ee146e11b4d9 ("wifi: ath12k: refactor core start based on hardware group")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/net/wireless/ath/ath12k/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 0606116d6b9c..212cd935e60a 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -1122,16 +1122,18 @@ int ath12k_core_qmi_firmware_ready(struct ath12k_base *ab)
 		ath12k_core_stop(ab);
 		mutex_unlock(&ab->core_lock);
 	}
+	mutex_unlock(&ag->mutex);
 	goto exit;
 
 err_dp_free:
 	ath12k_dp_free(ab);
 	mutex_unlock(&ab->core_lock);
+	mutex_unlock(&ag->mutex);
+
 err_firmware_stop:
 	ath12k_qmi_firmware_stop(ab);
 
 exit:
-	mutex_unlock(&ag->mutex);
 	return ret;
 }