On Sun, Mar 18, 2018 at 11:52:09AM +0100, Marek Vasut wrote:
> From: Dien Pham <dien.pham.ry@xxxxxxxxxxxxxxx>
>
> The controller clock can be switched off during suspend/resume,
> let runtime PM take care of that.
>
> Signed-off-by: Dien Pham <dien.pham.ry@xxxxxxxxxxxxxxx>
> Signed-off-by: Hien Dang <hien.dang.eb@xxxxxxxxxxx>
> Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Cc: Phil Edworthy <phil.edworthy@xxxxxxxxxxx>
> Cc: Simon Horman <horms+renesas@xxxxxxxxxxxx>
> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
> Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
> To: linux-pci@xxxxxxxxxxxxxxx
> ---
> V2: - Reorder the fail path in rcar_pcie_probe() to cater for the
> reordering of function calls in probe
> - Dispose of fail_clk in rcar_pcie_get_resources()
> V3: - Fix up the failpath in probe function
> V4: - Rebase on recent linux-next
> ---
> drivers/pci/host/pcie-rcar.c | 40 ++++++++++++----------------------------
> 1 file changed, 12 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
> index b4c4aad2cf66..93d59f15c589 100644
> --- a/drivers/pci/host/pcie-rcar.c
> +++ b/drivers/pci/host/pcie-rcar.c
> @@ -142,7 +142,6 @@ struct rcar_pcie {
> void __iomem *base;
> struct list_head resources;
> int root_bus_nr;
> - struct clk *clk;
> struct clk *bus_clk;
> struct rcar_msi msi;
> };
> @@ -914,24 +913,14 @@ static int rcar_pcie_get_resources(struct rcar_pcie *pcie)
> if (IS_ERR(pcie->base))
> return PTR_ERR(pcie->base);
>
> - pcie->clk = devm_clk_get(dev, "pcie");
> - if (IS_ERR(pcie->clk)) {
> - dev_err(dev, "cannot get platform clock\n");
> - return PTR_ERR(pcie->clk);
> - }
> - err = clk_prepare_enable(pcie->clk);
> - if (err)
> - return err;
> -
> pcie->bus_clk = devm_clk_get(dev, "pcie_bus");
> if (IS_ERR(pcie->bus_clk)) {
> dev_err(dev, "cannot get pcie bus clock\n");
> - err = PTR_ERR(pcie->bus_clk);
> - goto fail_clk;
> + return PTR_ERR(pcie->bus_clk);
> }
> err = clk_prepare_enable(pcie->bus_clk);
> if (err)
> - goto fail_clk;
> + return err;
>
> i = irq_of_parse_and_map(dev->of_node, 0);
> if (!i) {
> @@ -953,8 +942,6 @@ static int rcar_pcie_get_resources(struct rcar_pcie *pcie)
>
> err_map_reg:
> clk_disable_unprepare(pcie->bus_clk);
> -fail_clk:
> - clk_disable_unprepare(pcie->clk);
>
> return err;
> }
> @@ -1124,22 +1111,22 @@ static int rcar_pcie_probe(struct platform_device *pdev)
> if (err)
> goto err_free_bridge;
This error path now calls pci_free_resource_list() and in this case
the path is taken if rcar_pcie_parse_request_of_pci_ranges() fails.
Is that ok?
>
> + pm_runtime_enable(pcie->dev);
> + err = pm_runtime_get_sync(pcie->dev);
> + if (err < 0) {
> + dev_err(pcie->dev, "pm_runtime_get_sync failed\n");
> + goto err_pm_disable;
> + }
> +
> err = rcar_pcie_get_resources(pcie);
> if (err < 0) {
> dev_err(dev, "failed to request resources: %d\n", err);
> - goto err_free_resource_list;
> + goto err_pm_put;
> }
>
> err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node);
> if (err)
> - goto err_free_resource_list;
> -
> - pm_runtime_enable(dev);
> - err = pm_runtime_get_sync(dev);
> - if (err < 0) {
> - dev_err(dev, "pm_runtime_get_sync failed\n");
> - goto err_pm_disable;
> - }
> + goto err_pm_put;
>
> /* Failure to get a link might just be that no cards are inserted */
> hw_init_fn = of_device_get_match_data(dev);
> @@ -1171,13 +1158,10 @@ static int rcar_pcie_probe(struct platform_device *pdev)
>
> err_pm_put:
> pm_runtime_put(dev);
> -
> err_pm_disable:
> pm_runtime_disable(dev);
> -
> -err_free_resource_list:
> - pci_free_resource_list(&pcie->resources);
> err_free_bridge:
> + pci_free_resource_list(&pcie->resources);
> pci_free_host_bridge(bridge);
>
> return err;
> --
> 2.16.2
>
