On 3/10/2015 5:41 AM, Marek Szyprowski wrote:
> If device is configured to work only in HOST or DEVICE mode, there is
> no point in initializing both subdrivers. This patch also fixes
> resource leakage if host subdriver fails to initialize.
>
> Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
> ---
> drivers/usb/dwc2/core.h | 2 ++
> drivers/usb/dwc2/platform.c | 29 +++++++++++++++++++++--------
> 2 files changed, 23 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index 7a70a1349334..f93b06daef97 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -570,6 +570,8 @@ struct dwc2_hsotg {
> struct dwc2_core_params *core_params;
> enum usb_otg_state op_state;
> enum usb_dr_mode dr_mode;
> + unsigned int hcd_enabled:1;
> + unsigned int gadget_enabled:1;
>
> struct phy *phy;
> struct usb_phy *uphy;
> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
> index 6a795aa2ff05..ee0b0b06d0fc 100644
> --- a/drivers/usb/dwc2/platform.c
> +++ b/drivers/usb/dwc2/platform.c
> @@ -121,8 +121,10 @@ static int dwc2_driver_remove(struct platform_device
> *dev)
> {
> struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
>
> - dwc2_hcd_remove(hsotg);
> - s3c_hsotg_remove(hsotg);
> + if (hsotg->hcd_enabled)
> + dwc2_hcd_remove(hsotg);
> + if (hsotg->gadget_enabled)
> + s3c_hsotg_remove(hsotg);
>
> return 0;
> }
> @@ -214,12 +216,23 @@ static int dwc2_driver_probe(struct platform_device
> *dev)
>
> spin_lock_init(&hsotg->lock);
> mutex_init(&hsotg->init_mutex);
> - retval = dwc2_gadget_init(hsotg, irq);
> - if (retval)
> - return retval;
> - retval = dwc2_hcd_init(hsotg, irq, params);
> - if (retval)
> - return retval;
> +
> + if (hsotg->dr_mode != USB_DR_MODE_HOST) {
> + retval = dwc2_gadget_init(hsotg, irq);
> + if (retval)
> + return retval;
> + hsotg->gadget_enabled = 1;
> + }
> +
> + if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
> + retval = dwc2_hcd_init(hsotg, irq, params);
> + if (retval) {
> + if (hsotg->gadget_enabled)
> + s3c_hsotg_remove(hsotg);
> + return retval;
> + }
> + hsotg->hcd_enabled = 1;
> + }
>
> platform_set_drvdata(dev, hsotg);
>
>
Acked-by: John Youn <johny...@synopsys.com>
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