linux-kernel - [PATCH 5.18 756/879] PCI: qcom: Fix runtime PM imbalance on probe errors

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Date:   Tue,  7 Jun 2022 19:04:34 +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>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH 5.18 756/879] PCI: qcom: Fix runtime PM imbalance on probe errors

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

commit 87d83b96c8d6c6c2d2096bd0bdba73bcf42b8ef0 upstream.

Drop the leftover pm_runtime_disable() calls from the late probe error
paths that would, for example, prevent runtime PM from being reenabled
after a probe deferral.

Link: https://lore.kernel.org/r/20220401133854.10421-2-johan+linaro@kernel.org
Fixes: 6e5da6f7d824 ("PCI: qcom: Fix error handling in runtime PM support")
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      # 4.20
Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1621,17 +1621,14 @@ static int qcom_pcie_probe(struct platfo
 	pp->ops = &qcom_pcie_dw_ops;
 
 	ret = phy_init(pcie->phy);
-	if (ret) {
-		pm_runtime_disable(&pdev->dev);
+	if (ret)
 		goto err_pm_runtime_put;
-	}
 
 	platform_set_drvdata(pdev, pcie);
 
 	ret = dw_pcie_host_init(pp);
 	if (ret) {
 		dev_err(dev, "cannot initialize host\n");
-		pm_runtime_disable(&pdev->dev);
 		goto err_pm_runtime_put;
 	}