ath11k: fix rmmod failure if qmi sequence fails

QMI sequence fails if caldata file is not available.
It is observed that 'rmmod ath11k' fails if qmi message fails.
With this patch rmmod/insmod is working.

Logs:
Direct firmware load for IPQ8074/caldata.bin failed with error -2
Falling back to user helper
qmi failed to load CAL: IPQ8074/caldata.bin
qmi failed to load board data file:-11

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-00009-QCAHKSWPL_SILICONZ-1
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01699-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Anilkumar Kolli <akolli@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1606916215-24643-1-git-send-email-akolli@codeaurora.org

drivers/net/wireless/ath/ath11k/ahb.c

@@ -747,6 +747,13 @@ static int ath11k_ahb_remove(struct platform_device *pdev)
 	struct ath11k_base *ab = platform_get_drvdata(pdev);
 	unsigned long left;
 
+	if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) {
+		ath11k_ahb_power_down(ab);
+		ath11k_debugfs_soc_destroy(ab);
+		ath11k_qmi_deinit_service(ab);
+		goto qmi_fail;
+	}
+
 	reinit_completion(&ab->driver_recovery);
 
 	if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags)) {
@@ -760,8 +767,8 @@ static int ath11k_ahb_remove(struct platform_device *pdev)
 	cancel_work_sync(&ab->restart_work);
 
 	ath11k_core_deinit(ab);
+qmi_fail:
 	ath11k_ahb_free_irq(ab);
-
 	ath11k_hal_srng_deinit(ab);
 	ath11k_ce_free_pipes(ab);
 	ath11k_core_free(ab);

drivers/net/wireless/ath/ath11k/core.h

@@ -185,6 +185,7 @@ enum ath11k_dev_flags {
 	ATH11K_FLAG_RECOVERY,
 	ATH11K_FLAG_UNREGISTERING,
 	ATH11K_FLAG_REGISTERED,
+	ATH11K_FLAG_QMI_FAIL,
 };
 
 enum ath11k_monitor_flags {

drivers/net/wireless/ath/ath11k/debugfs.c

@@ -867,6 +867,7 @@ void ath11k_debugfs_soc_destroy(struct ath11k_base *ab)
 	debugfs_remove_recursive(ab->debugfs_ath11k);
 	ab->debugfs_ath11k = NULL;
 }
+EXPORT_SYMBOL(ath11k_debugfs_soc_destroy);
 
 void ath11k_debugfs_fw_stats_init(struct ath11k *ar)
 {

drivers/net/wireless/ath/ath11k/pci.c

@@ -1014,10 +1014,18 @@ static void ath11k_pci_remove(struct pci_dev *pdev)
 	struct ath11k_base *ab = pci_get_drvdata(pdev);
 	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
 
+	if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) {
+		ath11k_pci_power_down(ab);
+		ath11k_debugfs_soc_destroy(ab);
+		ath11k_qmi_deinit_service(ab);
+		goto qmi_fail;
+	}
+
 	set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags);
 
 	ath11k_core_deinit(ab);
 
+qmi_fail:
 	ath11k_mhi_unregister(ab_pci);
 
 	ath11k_pci_free_irq(ab);

drivers/net/wireless/ath/ath11k/qmi.c

@@ -2421,7 +2421,7 @@ ath11k_qmi_driver_event_post(struct ath11k_qmi *qmi,
 	return 0;
 }
 
-static void ath11k_qmi_event_server_arrive(struct ath11k_qmi *qmi)
+static int ath11k_qmi_event_server_arrive(struct ath11k_qmi *qmi)
 {
 	struct ath11k_base *ab = qmi->ab;
 	int ret;
@@ -2429,17 +2429,19 @@ static void ath11k_qmi_event_server_arrive(struct ath11k_qmi *qmi)
 	ret = ath11k_qmi_fw_ind_register_send(ab);
 	if (ret < 0) {
 		ath11k_warn(ab, "qmi failed to send FW indication QMI:%d\n", ret);
-		return;
+		return ret;
 	}
 
 	ret = ath11k_qmi_host_cap_send(ab);
 	if (ret < 0) {
 		ath11k_warn(ab, "qmi failed to send host cap QMI:%d\n", ret);
-		return;
+		return ret;
 	}
+
+	return ret;
 }
 
-static void ath11k_qmi_event_mem_request(struct ath11k_qmi *qmi)
+static int ath11k_qmi_event_mem_request(struct ath11k_qmi *qmi)
 {
 	struct ath11k_base *ab = qmi->ab;
 	int ret;
@@ -2447,11 +2449,13 @@ static void ath11k_qmi_event_mem_request(struct ath11k_qmi *qmi)
 	ret = ath11k_qmi_respond_fw_mem_request(ab);
 	if (ret < 0) {
 		ath11k_warn(ab, "qmi failed to respond fw mem req:%d\n", ret);
-		return;
+		return ret;
 	}
+
+	return ret;
 }
 
-static void ath11k_qmi_event_load_bdf(struct ath11k_qmi *qmi)
+static int ath11k_qmi_event_load_bdf(struct ath11k_qmi *qmi)
 {
 	struct ath11k_base *ab = qmi->ab;
 	int ret;
@@ -2459,7 +2463,7 @@ static void ath11k_qmi_event_load_bdf(struct ath11k_qmi *qmi)
 	ret = ath11k_qmi_request_target_cap(ab);
 	if (ret < 0) {
 		ath11k_warn(ab, "qmi failed to req target capabilities:%d\n", ret);
-		return;
+		return ret;
 	}
 
 	if (ab->bus_params.fixed_bdf_addr)
@@ -2468,14 +2472,16 @@ static void ath11k_qmi_event_load_bdf(struct ath11k_qmi *qmi)
 		ret = ath11k_qmi_load_bdf_qmi(ab);
 	if (ret < 0) {
 		ath11k_warn(ab, "qmi failed to load board data file:%d\n", ret);
-		return;
+		return ret;
 	}
 
 	ret = ath11k_qmi_wlanfw_m3_info_send(ab);
 	if (ret < 0) {
 		ath11k_warn(ab, "qmi failed to send m3 info req:%d\n", ret);
-		return;
+		return ret;
 	}
+
+	return ret;
 }
 
 static void ath11k_qmi_msg_mem_request_cb(struct qmi_handle *qmi_hdl,
@@ -2615,7 +2621,7 @@ static int ath11k_qmi_ops_new_server(struct qmi_handle *qmi_hdl,
 	ath11k_dbg(ab, ATH11K_DBG_QMI, "qmi wifi fw qmi service connected\n");
 	ath11k_qmi_driver_event_post(qmi, ATH11K_QMI_EVENT_SERVER_ARRIVE, NULL);
 
-	return 0;
+	return ret;
 }
 
 static void ath11k_qmi_ops_del_server(struct qmi_handle *qmi_hdl,
@@ -2639,6 +2645,7 @@ static void ath11k_qmi_driver_event_work(struct work_struct *work)
 					      event_work);
 	struct ath11k_qmi_driver_event *event;
 	struct ath11k_base *ab = qmi->ab;
+	int ret;
 
 	spin_lock(&qmi->event_lock);
 	while (!list_empty(&qmi->event_list)) {
@@ -2652,19 +2659,26 @@ static void ath11k_qmi_driver_event_work(struct work_struct *work)
 
 		switch (event->type) {
 		case ATH11K_QMI_EVENT_SERVER_ARRIVE:
-			ath11k_qmi_event_server_arrive(qmi);
+			ret = ath11k_qmi_event_server_arrive(qmi);
+			if (ret < 0)
+				set_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags);
 			break;
 		case ATH11K_QMI_EVENT_SERVER_EXIT:
 			set_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags);
 			set_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags);
 			break;
 		case ATH11K_QMI_EVENT_REQUEST_MEM:
-			ath11k_qmi_event_mem_request(qmi);
+			ret = ath11k_qmi_event_mem_request(qmi);
+			if (ret < 0)
+				set_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags);
 			break;
 		case ATH11K_QMI_EVENT_FW_MEM_READY:
-			ath11k_qmi_event_load_bdf(qmi);
+			ret = ath11k_qmi_event_load_bdf(qmi);
+			if (ret < 0)
+				set_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags);
 			break;
 		case ATH11K_QMI_EVENT_FW_READY:
+			clear_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags);
 			if (test_bit(ATH11K_FLAG_REGISTERED, &ab->dev_flags)) {
 				ath11k_hal_dump_srng_stats(ab);
 				queue_work(ab->workqueue, &ab->restart_work);
@@ -2742,4 +2756,5 @@ void ath11k_qmi_deinit_service(struct ath11k_base *ab)
 	ath11k_qmi_m3_free(ab);
 	ath11k_qmi_free_target_mem_chunk(ab);
 }
+EXPORT_SYMBOL(ath11k_qmi_deinit_service);