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BACKPORT: USB: gadget: core: adjust uevent timing on gadget unbind

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The KOBJ_CHANGE uevent is sent before gadget unbind is actually
executed, resulting in inaccurate uevent emitted at incorrect timing
(the uevent would have USB_UDC_DRIVER variable set while it would
soon be removed).
Move the KOBJ_CHANGE uevent to the end of the unbind function so that
uevent is sent only after the change has been made.

Fixes: 2ccea03a8f ("usb: gadget: introduce UDC Class")
Cc: stable@vger.kernel.org
Signed-off-by: Roy Luo <royluo@google.com>
Link: https://lore.kernel.org/r/20231128221756.2591158-1-royluo@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 312543856
Change-Id: Ida7fa7e1cfae3d1b3f3348512a67fe91065f25af
(cherry picked from commit 73ea73affe8622bdf292de898da869d441da6a9d)
[royluo: resolved conflicts in drivers/usb/gadget/udc/core.c]
Signed-off-by: Roy Luo <royluo@google.com>
This commit is contained in:
Roy Luo
2023-11-28 22:17:56 +00:00
committed by Treehugger Robot
parent 19a4494b2b
commit 80d91f64ba
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/gadget/udc/core.c
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@@ -1508,8 +1508,6 @@ static void usb_gadget_remove_driver(struct usb_udc *udc)
dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
udc->driver->function);
kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
mutex_lock(&connect_lock);
usb_gadget_disconnect_locked(udc->gadget);
usb_gadget_disable_async_callbacks(udc);
@@ -1525,6 +1523,8 @@ static void usb_gadget_remove_driver(struct usb_udc *udc)
udc->driver = NULL;
udc->gadget->dev.driver = NULL;
kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
}
/**