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From:   Baochen Qiang <quic_bqiang@quicinc.com>
To:     <ath11k@lists.infradead.org>
CC:     <linux-wireless@vger.kernel.org>
Subject: [PATCH 1/2] wifi: ath11k: move pci.ops registration ahead
Date:   Mon, 7 Aug 2023 14:17:48 +0800
Message-ID: <20230807061749.9404-2-quic_bqiang@quicinc.com>
In-Reply-To: <20230807061749.9404-1-quic_bqiang@quicinc.com>
References: <20230807061749.9404-1-quic_bqiang@quicinc.com>
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In ath11k_pci_probe() there is a switch statement that, based
upon the PCI device ID, assigns pci_ops. After the switch,
ath11k_pcic_register_pci_ops() is called to register the pci_ops.

Unfortunately, this registration is too late if any of the cases
in the switch need to perform operations that require the pci_ops
to already be registered. In particular, an upcoming patch for
QCA2066 needs to call ath11k_pcic_read32().

To address this issue, call ath11k_pcic_register_pci_ops() from
each case instead of doing so after the switch. That way the ops
will be registered if any subsequent operations within the case
processing require the ops to be present.

Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
---
 drivers/net/wireless/ath/ath11k/pci.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 5fd08ffc2a9f..dace2835719d 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -729,7 +729,6 @@ static int ath11k_pci_probe(struct pci_dev *pdev,
 	struct ath11k_base *ab;
 	struct ath11k_pci *ab_pci;
 	u32 soc_hw_version_major, soc_hw_version_minor, addr;
-	const struct ath11k_pci_ops *pci_ops;
 	int ret;
 
 	ab = ath11k_core_alloc(&pdev->dev, sizeof(*ab_pci), ATH11K_BUS_PCI);
@@ -775,6 +774,12 @@ static int ath11k_pci_probe(struct pci_dev *pdev,
 
 	switch (pci_dev->device) {
 	case QCA6390_DEVICE_ID:
+		ret = ath11k_pcic_register_pci_ops(ab, &ath11k_pci_ops_qca6390);
+		if (ret) {
+			ath11k_err(ab, "failed to register PCI ops: %d\n", ret);
+			goto err_pci_free_region;
+		}
+
 		ath11k_pci_read_hw_version(ab, &soc_hw_version_major,
 					   &soc_hw_version_minor);
 		switch (soc_hw_version_major) {
@@ -788,13 +793,21 @@ static int ath11k_pci_probe(struct pci_dev *pdev,
 			goto err_pci_free_region;
 		}
 
-		pci_ops = &ath11k_pci_ops_qca6390;
 		break;
 	case QCN9074_DEVICE_ID:
-		pci_ops = &ath11k_pci_ops_qcn9074;
+		ret = ath11k_pcic_register_pci_ops(ab, &ath11k_pci_ops_qcn9074);
+		if (ret) {
+			ath11k_err(ab, "failed to register PCI ops: %d\n", ret);
+			goto err_pci_free_region;
+		}
 		ab->hw_rev = ATH11K_HW_QCN9074_HW10;
 		break;
 	case WCN6855_DEVICE_ID:
+		ret = ath11k_pcic_register_pci_ops(ab, &ath11k_pci_ops_qca6390);
+		if (ret) {
+			ath11k_err(ab, "failed to register PCI ops: %d\n", ret);
+			goto err_pci_free_region;
+		}
 		ab->id.bdf_search = ATH11K_BDF_SEARCH_BUS_AND_BOARD;
 		ath11k_pci_read_hw_version(ab, &soc_hw_version_major,
 					   &soc_hw_version_minor);
@@ -821,7 +834,6 @@ static int ath11k_pci_probe(struct pci_dev *pdev,
 			goto err_pci_free_region;
 		}
 
-		pci_ops = &ath11k_pci_ops_qca6390;
 		break;
 	default:
 		dev_err(&pdev->dev, "Unknown PCI device found: 0x%x\n",
@@ -830,12 +842,6 @@ static int ath11k_pci_probe(struct pci_dev *pdev,
 		goto err_pci_free_region;
 	}
 
-	ret = ath11k_pcic_register_pci_ops(ab, pci_ops);
-	if (ret) {
-		ath11k_err(ab, "failed to register PCI ops: %d\n", ret);
-		goto err_pci_free_region;
-	}
-
 	ret = ath11k_pcic_init_msi_config(ab);
 	if (ret) {
 		ath11k_err(ab, "failed to init msi config: %d\n", ret);
-- 
2.25.1