Re: [PATCH] usb: dwc3: gadget: remove warning during kernel boot

Greg KH
2024-02-20T08:34:31Z

On Tue, Feb 20, 2024 at 04:12:04PM +0800, Ray Chi wrote:
> The dwc3->gadget_driver is not initialized during the dwc3 probe
> process. This leads to a warning when the runtime power management (PM)
> attempts to suspend the gadget using dwc3_gadget_suspend().

What type of warning happens?

> This patch adds a check to prevent the warning.
>
> Cc: stable@vger.kernel.org
> Fixes: 61a348857e86 ("usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend")
> Signed-off-by: Ray Chi <raychi@google.com>
> ---
> drivers/usb/dwc3/gadget.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 28f49400f3e8..de987cffe1ec 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -4708,6 +4708,9 @@ int dwc3_gadget_suspend(struct dwc3 *dwc)
> unsigned long flags;
> int ret;
>
> + if (!dwc->gadget_driver)
> + return 0;
> +

This directly reverts part of the commit you say this fixes, are you
SURE about this? Why?

thanks,

greg k-h