PCI: qcom: Fix host-init error handling

[ Upstream commit 997e010de9134474dbfde52be03efd7d1bce902d ]

Implement the new host_deinit() callback so that the PHY is powered off
and regulators and clocks are disabled also on late host-init errors.

Link: https://lore.kernel.org/r/20221017114705.8277-2-johan+linaro@kernel.org
Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index f711aca..f8e5125 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1527,8 +1527,19 @@ err_deinit:
        return ret;
 }
 
+static void qcom_pcie_host_deinit(struct dw_pcie_rp *pp)
+{
+       struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+       struct qcom_pcie *pcie = to_qcom_pcie(pci);
+
+       qcom_ep_reset_assert(pcie);
+       phy_power_off(pcie->phy);
+       pcie->cfg->ops->deinit(pcie);
+}
+
 static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
-       .host_init = qcom_pcie_host_init,
+       .host_init      = qcom_pcie_host_init,
+       .host_deinit    = qcom_pcie_host_deinit,
 };
 
 /* Qcom IP rev.: 2.1.0 Synopsys IP rev.: 4.01a */