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Subject[PATCH v3 1/4] PCI: rockchip: Fix error handlings
Date
Fix error handlings in probe & resume.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

drivers/pci/host/pcie-rockchip.c | 103 ++++++++++++++++++++++-----------------
1 file changed, 58 insertions(+), 45 deletions(-)

diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
index 7bb9870f6d8c..e9867bcff1ff 100644
--- a/drivers/pci/host/pcie-rockchip.c
+++ b/drivers/pci/host/pcie-rockchip.c
@@ -546,25 +546,25 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
err = reset_control_assert(rockchip->core_rst);
if (err) {
dev_err(dev, "assert core_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

err = reset_control_assert(rockchip->mgmt_rst);
if (err) {
dev_err(dev, "assert mgmt_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

err = reset_control_assert(rockchip->mgmt_sticky_rst);
if (err) {
dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

err = reset_control_assert(rockchip->pipe_rst);
if (err) {
dev_err(dev, "assert pipe_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

udelay(10);
@@ -572,19 +572,19 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
err = reset_control_deassert(rockchip->pm_rst);
if (err) {
dev_err(dev, "deassert pm_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

err = reset_control_deassert(rockchip->aclk_rst);
if (err) {
dev_err(dev, "deassert aclk_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

err = reset_control_deassert(rockchip->pclk_rst);
if (err) {
dev_err(dev, "deassert pclk_rst err %d\n", err);
- return err;
+ goto err_exit_phy;
}

if (rockchip->link_gen == 2)
@@ -605,7 +605,7 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
err = phy_power_on(rockchip->phy);
if (err) {
dev_err(dev, "fail to power on phy, err %d\n", err);
- return err;
+ goto err_exit_phy;
}

/*
@@ -615,25 +615,25 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
err = reset_control_deassert(rockchip->mgmt_sticky_rst);
if (err) {
dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
- return err;
+ goto err_power_off_phy;
}

err = reset_control_deassert(rockchip->core_rst);
if (err) {
dev_err(dev, "deassert core_rst err %d\n", err);
- return err;
+ goto err_power_off_phy;
}

err = reset_control_deassert(rockchip->mgmt_rst);
if (err) {
dev_err(dev, "deassert mgmt_rst err %d\n", err);
- return err;
+ goto err_power_off_phy;
}

err = reset_control_deassert(rockchip->pipe_rst);
if (err) {
dev_err(dev, "deassert pipe_rst err %d\n", err);
- return err;
+ goto err_power_off_phy;
}

/* Fix the transmitted FTS count desired to exit from L0s. */
@@ -666,7 +666,7 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
500 * USEC_PER_MSEC);
if (err) {
dev_err(dev, "PCIe link training gen1 timeout!\n");
- return -ETIMEDOUT;
+ goto err_power_off_phy;
}

if (rockchip->link_gen == 2) {
@@ -715,6 +715,11 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR);

return 0;
+err_power_off_phy:
+ phy_power_off(rockchip->phy);
+err_exit_phy:
+ phy_exit(rockchip->phy);
+ return err;
}

static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
@@ -1051,7 +1056,7 @@ static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
err = regulator_enable(rockchip->vpcie3v3);
if (err) {
dev_err(dev, "fail to enable vpcie3v3 regulator\n");
- goto err_out;
+ return err;
}
}

@@ -1072,14 +1077,12 @@ static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
}

return 0;
-
err_disable_1v8:
if (!IS_ERR(rockchip->vpcie1v8))
regulator_disable(rockchip->vpcie1v8);
err_disable_3v3:
if (!IS_ERR(rockchip->vpcie3v3))
regulator_disable(rockchip->vpcie3v3);
-err_out:
return err;
}

@@ -1315,43 +1318,47 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)

err = clk_prepare_enable(rockchip->clk_pcie_pm);
if (err)
- goto err_pcie_pm;
+ goto err_disable_0v9;

err = clk_prepare_enable(rockchip->hclk_pcie);
if (err)
- goto err_hclk_pcie;
+ goto err_disable_clk_pcie_pm;

err = clk_prepare_enable(rockchip->aclk_perf_pcie);
if (err)
- goto err_aclk_perf_pcie;
+ goto err_disable_hclk_pcie;

err = clk_prepare_enable(rockchip->aclk_pcie);
if (err)
- goto err_aclk_pcie;
+ goto err_disable_aclk_perf_pcie;

err = rockchip_pcie_init_port(rockchip);
if (err)
- goto err_pcie_resume;
+ goto err_disable_aclk_pcie;

err = rockchip_pcie_cfg_atu(rockchip);
if (err)
- goto err_pcie_resume;
+ goto err_deinit_port;

/* Need this to enter L1 again */
rockchip_pcie_update_txcredit_mui(rockchip);
rockchip_pcie_enable_interrupts(rockchip);

return 0;
-
-err_pcie_resume:
+err_deinit_port:
+ phy_power_off(rockchip->phy);
+ phy_exit(rockchip->phy);
+err_disable_aclk_pcie:
clk_disable_unprepare(rockchip->aclk_pcie);
-err_aclk_pcie:
+err_disable_aclk_perf_pcie:
clk_disable_unprepare(rockchip->aclk_perf_pcie);
-err_aclk_perf_pcie:
+err_disable_hclk_pcie:
clk_disable_unprepare(rockchip->hclk_pcie);
-err_hclk_pcie:
+err_disable_clk_pcie_pm:
clk_disable_unprepare(rockchip->clk_pcie_pm);
-err_pcie_pm:
+err_disable_0v9:
+ if (!IS_ERR(rockchip->vpcie0v9))
+ regulator_disable(rockchip->vpcie0v9);
return err;
}

@@ -1388,47 +1395,47 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
err = clk_prepare_enable(rockchip->aclk_pcie);
if (err) {
dev_err(dev, "unable to enable aclk_pcie clock\n");
- goto err_aclk_pcie;
+ return err;
}

err = clk_prepare_enable(rockchip->aclk_perf_pcie);
if (err) {
dev_err(dev, "unable to enable aclk_perf_pcie clock\n");
- goto err_aclk_perf_pcie;
+ goto err_disable_aclk_pcie;
}

err = clk_prepare_enable(rockchip->hclk_pcie);
if (err) {
dev_err(dev, "unable to enable hclk_pcie clock\n");
- goto err_hclk_pcie;
+ goto err_disable_aclk_perf_pcie;
}

err = clk_prepare_enable(rockchip->clk_pcie_pm);
if (err) {
dev_err(dev, "unable to enable hclk_pcie clock\n");
- goto err_pcie_pm;
+ goto err_disable_hclk_pcie;
}

err = rockchip_pcie_set_vpcie(rockchip);
if (err) {
dev_err(dev, "failed to set vpcie regulator\n");
- goto err_set_vpcie;
+ goto err_disable_clk_pcie_pm;
}

err = rockchip_pcie_init_port(rockchip);
if (err)
- goto err_vpcie;
+ goto err_disable_vpcie;

rockchip_pcie_enable_interrupts(rockchip);

err = rockchip_pcie_init_irq_domain(rockchip);
if (err < 0)
- goto err_vpcie;
+ goto err_deinit_port;

err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
&res, &io_base);
if (err)
- goto err_vpcie;
+ goto err_remove_irq_domain;

err = devm_request_pci_bus_resources(dev, &res);
if (err)
@@ -1466,12 +1473,12 @@ static int rockchip_pcie_probe(struct platform_device *pdev)

err = rockchip_pcie_cfg_atu(rockchip);
if (err)
- goto err_free_res;
+ goto err_unmap_iospace;

rockchip->msg_region = devm_ioremap(dev, rockchip->msg_bus_addr, SZ_1M);
if (!rockchip->msg_region) {
err = -ENOMEM;
- goto err_free_res;
+ goto err_unmap_iospace;
}

list_splice_init(&res, &bridge->windows);
@@ -1496,26 +1503,32 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
pcie_bus_configure_settings(child);

pci_bus_add_devices(bus);
- return 0;

+ return 0;
+err_unmap_iospace:
+ pci_unmap_iospace(rockchip->io);
err_free_res:
pci_free_resource_list(&res);
-err_vpcie:
+err_remove_irq_domain:
+ irq_domain_remove(rockchip->irq_domain);
+err_deinit_port:
+ phy_power_off(rockchip->phy);
+ phy_exit(rockchip->phy);
+err_disable_vpcie:
if (!IS_ERR(rockchip->vpcie3v3))
regulator_disable(rockchip->vpcie3v3);
if (!IS_ERR(rockchip->vpcie1v8))
regulator_disable(rockchip->vpcie1v8);
if (!IS_ERR(rockchip->vpcie0v9))
regulator_disable(rockchip->vpcie0v9);
-err_set_vpcie:
+err_disable_clk_pcie_pm:
clk_disable_unprepare(rockchip->clk_pcie_pm);
-err_pcie_pm:
+err_disable_hclk_pcie:
clk_disable_unprepare(rockchip->hclk_pcie);
-err_hclk_pcie:
+err_disable_aclk_perf_pcie:
clk_disable_unprepare(rockchip->aclk_perf_pcie);
-err_aclk_perf_pcie:
+err_disable_aclk_pcie:
clk_disable_unprepare(rockchip->aclk_pcie);
-err_aclk_pcie:
return err;
}

--
2.11.0

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