linux-kernel - [PATCH v2 5/7] PCI: xilinx-nwl: Clean up clock on probe failure/removal

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Message-Id: <20240506161510.2841755-6-sean.anderson@linux.dev>
Date: Mon,  6 May 2024 12:15:08 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	linux-pci@...r.kernel.org
Cc: Michal Simek <michal.simek@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Thippeswamy Havalige <thippeswamy.havalige@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Sean Anderson <sean.anderson@...ux.dev>,
	Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Michal Simek <michal.simek@...inx.com>
Subject: [PATCH v2 5/7] PCI: xilinx-nwl: Clean up clock on probe failure/removal

Make sure we turn off the clock on probe failure and device removal.

Fixes: de0a01f52966 ("PCI: xilinx-nwl: Enable the clock through CCF")
Signed-off-by: Sean Anderson <sean.anderson@...ux.dev>
---

(no changes since v1)

 drivers/pci/controller/pcie-xilinx-nwl.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index c0a60cebdb2e..424cc5a1b4d1 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -779,6 +779,7 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	pcie = pci_host_bridge_priv(bridge);
+	platform_set_drvdata(pdev, pcie);
 
 	pcie->dev = dev;
 
@@ -801,13 +802,13 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 	err = nwl_pcie_bridge_init(pcie);
 	if (err) {
 		dev_err(dev, "HW Initialization failed\n");
-		return err;
+		goto err_clk;
 	}
 
 	err = nwl_pcie_init_irq_domain(pcie);
 	if (err) {
 		dev_err(dev, "Failed creating IRQ Domain\n");
-		return err;
+		goto err_clk;
 	}
 
 	bridge->sysdata = pcie;
@@ -817,11 +818,23 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 		err = nwl_pcie_enable_msi(pcie);
 		if (err < 0) {
 			dev_err(dev, "failed to enable MSI support: %d\n", err);
-			return err;
+			goto err_clk;
 		}
 	}
 
-	return pci_host_probe(bridge);
+	err = pci_host_probe(bridge);
+
+err_clk:
+	if (err)
+		clk_disable_unprepare(pcie->clk);
+	return err;
+}
+
+static void nwl_pcie_remove(struct platform_device *pdev)
+{
+	struct nwl_pcie *pcie = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(pcie->clk);
 }
 
 static struct platform_driver nwl_pcie_driver = {
@@ -831,5 +844,6 @@ static struct platform_driver nwl_pcie_driver = {
 		.of_match_table = nwl_pcie_of_match,
 	},
 	.probe = nwl_pcie_probe,
+	.remove_new = nwl_pcie_remove,
 };
 builtin_platform_driver(nwl_pcie_driver);
-- 
2.35.1.1320.gc452695387.dirty