On Mon, 30 Oct 2017, Masahiro Yamada wrote:
> Generic drivers like this need to control arbitrary numbers of reset
> lines. Instead of hard-coding the maximum number of resets, use the
> reset array API. It can manage a bunch of resets behind the scene.
>
> Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
> ---
> drivers/usb/host/ehci-platform.c | 33 +++++++++++----------------------
> 1 file changed, 11 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-platform.c
> b/drivers/usb/host/ehci-platform.c
> index f1908ea..64fd643 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -40,12 +40,11 @@
>
> #define DRIVER_DESC "EHCI generic platform driver"
> #define EHCI_MAX_CLKS 4
> -#define EHCI_MAX_RSTS 4
> #define hcd_to_ehci_priv(h) ((struct ehci_platform_priv
> *)hcd_to_ehci(h)->priv)
>
> struct ehci_platform_priv {
> struct clk *clks[EHCI_MAX_CLKS];
> - struct reset_control *rsts[EHCI_MAX_RSTS];
> + struct reset_control *rsts;
> struct phy **phys;
> int num_phys;
> bool reset_on_resume;
> @@ -151,7 +150,7 @@ static int ehci_platform_probe(struct platform_device
> *dev)
> struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
> struct ehci_platform_priv *priv;
> struct ehci_hcd *ehci;
> - int err, irq, phy_num, clk = 0, rst;
> + int err, irq, phy_num, clk = 0;
>
> if (usb_disabled())
> return -ENODEV;
> @@ -239,21 +238,13 @@ static int ehci_platform_probe(struct platform_device
> *dev)
> }
> }
>
> - for (rst = 0; rst < EHCI_MAX_RSTS; rst++) {
> - priv->rsts[rst] = devm_reset_control_get_shared_by_index(
> - &dev->dev, rst);
> - if (IS_ERR(priv->rsts[rst])) {
> - err = PTR_ERR(priv->rsts[rst]);
> - if (err == -EPROBE_DEFER)
> - goto err_reset;
> - priv->rsts[rst] = NULL;
> - break;
> - }
> + priv->rsts = devm_reset_control_array_get_optional_shared(&dev->dev);
> + if (IS_ERR(priv->rsts))
> + return PTR_ERR(priv->rsts);
You must not return. Instead you should set err and jump to
err_put_clks.
Alan Stern
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