From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
To: Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
linux-usb@vger.kernel.org
Cc: John Youn <John.Youn@synopsys.com>,
stable@vger.kernel.org, Marek Vasut <marex@denx.de>
Subject: [PATCH v3] usb: dwc2: Postponed gadget registration to the udc class driver
Date: Sun, 31 May 2020 19:54:46 +0400 [thread overview]
Message-ID: <867ae31fcdfde93e45f12bcab23d6055ebd4024c.1590940209.git.hminas@synopsys.com> (raw)
During dwc2 driver probe, after gadget registration to the udc class
driver, if exist any builtin function driver it immediately bound to
dwc2 and after init host side (dwc2_hcd_init()) stucked in host mode.
Patch postpone gadget registration after host side initialization done.
Cc: stable@vger.kernel.org
Fixes: 117777b2c3bb9 ("usb: dwc2: Move gadget probe function into
platform code")
Reported-by: kbuild test robot <lkp@intel.com>
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
---
Changes in V2:
- added module configuration check
Changed in V3:
- added tag "Reported-by: kbuild test robot <lkp@intel.com>
drivers/usb/dwc2/gadget.c | 6 ------
drivers/usb/dwc2/platform.c | 11 +++++++++++
2 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 12b98b466287..7faf5f8c056d 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -4920,12 +4920,6 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg)
epnum, 0);
}
- ret = usb_add_gadget_udc(dev, &hsotg->gadget);
- if (ret) {
- dwc2_hsotg_ep_free_request(&hsotg->eps_out[0]->ep,
- hsotg->ctrl_req);
- return ret;
- }
dwc2_hsotg_dump(hsotg);
return 0;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index e571c8ae65ec..c347d93eae64 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -575,6 +575,17 @@ static int dwc2_driver_probe(struct platform_device *dev)
if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
dwc2_lowlevel_hw_disable(hsotg);
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
+ IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+ /* Postponed adding a new gadget to the udc class driver list */
+ if (hsotg->gadget_enabled) {
+ retval = usb_add_gadget_udc(hsotg->dev, &hsotg->gadget);
+ if (retval) {
+ dwc2_hsotg_remove(hsotg);
+ goto error_init;
+ }
+ }
+#endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */
return 0;
error_init:
--
2.11.0
next reply other threads:[~2020-05-31 15:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-31 15:54 Minas Harutyunyan [this message]
2020-06-05 14:10 ` [PATCH v3] usb: dwc2: Postponed gadget registration to the udc class driver Sasha Levin
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