linux-kernel - [PATCH 5.15 556/667] PCI: qcom: Fix unbalanced PHY init on probe errors

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Message-Id: <20220607164951.374913710@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:03:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Johan Hovold <johan+linaro@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>
Subject: [PATCH 5.15 556/667] PCI: qcom: Fix unbalanced PHY init on probe errors

From: Johan Hovold <johan+linaro@...nel.org>

commit 83013631f0f9961416abd812e228c8efbc2f6069 upstream.

Undo the PHY initialisation (e.g. balance runtime PM) if host
initialisation fails during probe.

Link: https://lore.kernel.org/r/20220401133854.10421-3-johan+linaro@kernel.org
Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Acked-by: Stanimir Varbanov <svarbanov@...sol.com>
Cc: stable@...r.kernel.org      # 4.5
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1529,11 +1529,13 @@ static int qcom_pcie_probe(struct platfo
 	ret = dw_pcie_host_init(pp);
 	if (ret) {
 		dev_err(dev, "cannot initialize host\n");
-		goto err_pm_runtime_put;
+		goto err_phy_exit;
 	}
 
 	return 0;
 
+err_phy_exit:
+	phy_exit(pcie->phy);
 err_pm_runtime_put:
 	pm_runtime_put(dev);
 	pm_runtime_disable(dev);