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Date: Wed, 12 Sep 2012 16:51:22 +0300
From: Felipe Balbi <balbi@...com>
To: Venu Byravarasu <vbyravarasu@...dia.com>
Cc: balbi@...com, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org, Alan Stern <stern@...land.harvard.edu>
Subject: Re: [PATCH] usb: host: tegra: code clean up
Hi,
On Wed, Sep 12, 2012 at 12:32:42PM +0530, Venu Byravarasu wrote:
> As part of code clean up, used devm counterparts for the APIs
> possible.
>
> Signed-off-by: Venu Byravarasu <vbyravarasu@...dia.com>
EHCI is Alan's domain.
> ---
> drivers/usb/host/ehci-tegra.c | 46 ++++++++++++++--------------------------
> 1 files changed, 16 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
> index c0d4732..532db04 100644
> --- a/drivers/usb/host/ehci-tegra.c
> +++ b/drivers/usb/host/ehci-tegra.c
> @@ -634,7 +634,8 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>
> setup_vbus_gpio(pdev, pdata);
>
> - tegra = kzalloc(sizeof(struct tegra_ehci_hcd), GFP_KERNEL);
> + tegra = devm_kzalloc(&pdev->dev, sizeof(struct tegra_ehci_hcd),
> + GFP_KERNEL);
> if (!tegra)
> return -ENOMEM;
>
> @@ -642,13 +643,12 @@ static int tegra_ehci_probe(struct platform_device *pdev)
> dev_name(&pdev->dev));
> if (!hcd) {
> dev_err(&pdev->dev, "Unable to create HCD\n");
> - err = -ENOMEM;
> - goto fail_hcd;
> + return -ENOMEM;
> }
>
> platform_set_drvdata(pdev, tegra);
>
> - tegra->clk = clk_get(&pdev->dev, NULL);
> + tegra->clk = devm_clk_get(&pdev->dev, NULL);
> if (IS_ERR(tegra->clk)) {
> dev_err(&pdev->dev, "Can't get ehci clock\n");
> err = PTR_ERR(tegra->clk);
> @@ -657,9 +657,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>
> err = clk_prepare_enable(tegra->clk);
> if (err)
> - goto fail_clken;
> + goto fail_clk;
>
> - tegra->emc_clk = clk_get(&pdev->dev, "emc");
> + tegra->emc_clk = devm_clk_get(&pdev->dev, "emc");
> if (IS_ERR(tegra->emc_clk)) {
> dev_err(&pdev->dev, "Can't get emc clock\n");
> err = PTR_ERR(tegra->emc_clk);
> @@ -677,7 +677,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
> }
> hcd->rsrc_start = res->start;
> hcd->rsrc_len = resource_size(res);
> - hcd->regs = ioremap(res->start, resource_size(res));
> + hcd->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> if (!hcd->regs) {
> dev_err(&pdev->dev, "Failed to remap I/O memory\n");
> err = -ENOMEM;
> @@ -701,8 +701,8 @@ static int tegra_ehci_probe(struct platform_device *pdev)
> break;
> default:
> err = -ENODEV;
> - dev_err(&pdev->dev, "unknown usb instance\n");
> - goto fail_phy;
> + dev_err(&pdev->dev, "unknown usb inst:%d\n", instance);
> + goto fail_io;
> }
> }
>
> @@ -712,7 +712,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
> if (IS_ERR(tegra->phy)) {
> dev_err(&pdev->dev, "Failed to open USB phy\n");
> err = -ENXIO;
> - goto fail_phy;
> + goto fail_io;
> }
>
> usb_phy_init(&tegra->phy->u_phy);
> @@ -735,7 +735,8 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>
> #ifdef CONFIG_USB_OTG_UTILS
> if (pdata->operating_mode == TEGRA_USB_OTG) {
> - tegra->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
> + tegra->transceiver =
> + devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
> if (!IS_ERR_OR_NULL(tegra->transceiver))
> otg_set_host(tegra->transceiver->otg, &hcd->self);
> }
> @@ -743,7 +744,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>
> err = usb_add_hcd(hcd, irq, IRQF_SHARED);
> if (err) {
> - dev_err(&pdev->dev, "Failed to add USB HCD\n");
> + dev_err(&pdev->dev, "usb_add_hcd failed with err 0x%x\n", err);
> goto fail;
> }
>
> @@ -752,32 +753,23 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>
> /* Don't skip the pm_runtime_forbid call if wakeup isn't working */
> /* if (!pdata->power_down_on_bus_suspend) */
> - pm_runtime_forbid(&pdev->dev);
> + pm_runtime_forbid(&pdev->dev);
> pm_runtime_enable(&pdev->dev);
> pm_runtime_put_sync(&pdev->dev);
> return err;
>
> fail:
> #ifdef CONFIG_USB_OTG_UTILS
> - if (!IS_ERR_OR_NULL(tegra->transceiver)) {
> + if (!IS_ERR_OR_NULL(tegra->transceiver))
> otg_set_host(tegra->transceiver->otg, NULL);
> - usb_put_phy(tegra->transceiver);
> - }
> #endif
> usb_phy_shutdown(&tegra->phy->u_phy);
> -fail_phy:
> - iounmap(hcd->regs);
> fail_io:
> clk_disable_unprepare(tegra->emc_clk);
> - clk_put(tegra->emc_clk);
> fail_emc_clk:
> clk_disable_unprepare(tegra->clk);
> -fail_clken:
> - clk_put(tegra->clk);
> fail_clk:
> usb_put_hcd(hcd);
> -fail_hcd:
> - kfree(tegra);
> return err;
> }
>
> @@ -794,26 +786,20 @@ static int tegra_ehci_remove(struct platform_device *pdev)
> pm_runtime_put_noidle(&pdev->dev);
>
> #ifdef CONFIG_USB_OTG_UTILS
> - if (!IS_ERR_OR_NULL(tegra->transceiver)) {
> + if (!IS_ERR_OR_NULL(tegra->transceiver))
> otg_set_host(tegra->transceiver->otg, NULL);
> - usb_put_phy(tegra->transceiver);
> - }
> #endif
>
> usb_remove_hcd(hcd);
>
> usb_phy_shutdown(&tegra->phy->u_phy);
> - iounmap(hcd->regs);
>
> usb_put_hcd(hcd);
>
> clk_disable_unprepare(tegra->clk);
> - clk_put(tegra->clk);
>
> clk_disable_unprepare(tegra->emc_clk);
> - clk_put(tegra->emc_clk);
>
> - kfree(tegra);
> return 0;
> }
>
> --
> 1.7.1.1
>
--
balbi
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