From e39af88f18dfe9a7938765c97ce9ed448915e6d5 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Tue, 10 Mar 2015 13:41:10 +0100 Subject: [PATCH] usb: dwc2: rework initialization of host and gadget in dual-role mode 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. Acked-by: John Youn Signed-off-by: Marek Szyprowski Signed-off-by: Felipe Balbi --- 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 f74304b12652..836c012c7707 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -593,6 +593,8 @@ 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 ae095f009b4f..185663e0b5f4 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; } @@ -234,12 +236,23 @@ 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); -- 2.20.1