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From:   Anilkumar Kolli <akolli@codeaurora.org>
To:     ath11k@lists.infradead.org
Cc:     linux-wireless@vger.kernel.org,
        Anilkumar Kolli <akolli@codeaurora.org>
Subject: [PATCH v3] ath11k: fix rmmod failure if qmi sequence fails
Date:   Wed,  2 Dec 2020 19:06:55 +0530
Message-Id: <1606916215-24643-1-git-send-email-akolli@codeaurora.org>
Precedence: bulk

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>
---
V3:
  - fixed rmmod hang issue(kvalo)
V2:
  - Rebased on latest tree

 drivers/net/wireless/ath/ath11k/ahb.c     |  9 +++++++-
 drivers/net/wireless/ath/ath11k/core.h    |  1 +
 drivers/net/wireless/ath/ath11k/debugfs.c |  1 +
 drivers/net/wireless/ath/ath11k/pci.c     |  8 +++++++
 drivers/net/wireless/ath/ath11k/qmi.c     | 38 ++++++++++++++++++++-----------
 5 files changed, 43 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index 4ac730e70f01..8c9c781afc3e 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/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);
diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 8874fa7b4e53..71033fa59739 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -184,6 +184,7 @@ enum ath11k_dev_flags {
 	ATH11K_FLAG_RECOVERY,
 	ATH11K_FLAG_UNREGISTERING,
 	ATH11K_FLAG_REGISTERED,
+	ATH11K_FLAG_QMI_FAIL,
 };
 
 enum ath11k_monitor_flags {
diff --git a/drivers/net/wireless/ath/ath11k/debugfs.c b/drivers/net/wireless/ath/ath11k/debugfs.c
index 1b914e67d314..554feaf1ed5c 100644
--- a/drivers/net/wireless/ath/ath11k/debugfs.c
+++ b/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)
 {
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 1d3fcf6e6c0c..43a0aa79a13c 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -1111,10 +1111,18 @@ 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);
diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index ae14984da91b..e1b032ff23a0 100644
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2419,7 +2419,7 @@ 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;
@@ -2427,17 +2427,19 @@ 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;
@@ -2445,11 +2447,13 @@ 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;
@@ -2457,7 +2461,7 @@ 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)
@@ -2466,14 +2470,16 @@ 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,
@@ -2613,7 +2619,7 @@ 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,
@@ -2637,6 +2643,7 @@ 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 = 0;
 
 	spin_lock(&qmi->event_lock);
 	while (!list_empty(&qmi->event_list)) {
@@ -2650,19 +2657,20 @@ 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);
 			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);
 			break;
 		case ATH11K_QMI_EVENT_FW_MEM_READY:
-			ath11k_qmi_event_load_bdf(qmi);
+			ret = ath11k_qmi_event_load_bdf(qmi);
 			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);
@@ -2688,6 +2696,9 @@ static void ath11k_qmi_driver_event_work(struct work_struct *work)
 			break;
 		}
 		kfree(event);
+		if (ret < 0)
+			set_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags);
+
 		spin_lock(&qmi->event_lock);
 	}
 	spin_unlock(&qmi->event_lock);
@@ -2740,4 +2751,5 @@ 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);
 
-- 
2.7.4