[PATCH] usb: dwc2: Add missing null check

[Mattijs Korpershoek]

Hi Andrew,

Thank you for the patch.

On Mon, Sep 29, 2025 at 17:40, Andrew Goodbody <andrew.goodbody at linaro.org> wrote:

> Add in the missing null check for dev->driver that is present at other
> points in the function before it is dereferenced.
>
> This issue was found by Smatch.
>
> Signed-off-by: Andrew Goodbody <andrew.goodbody at linaro.org>

Reviewed-by: Mattijs Korpershoek <mkorpershoek at kernel.org>

> ---
>  drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
> index fca052b4556a7d2ae4fe516e39820611d7082e2f..5a7f50ebaa5579f67ea5dc9491d0d1f4d4b81ea1 100644
> --- a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
> +++ b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
> @@ -526,7 +526,7 @@ static int dwc2_udc_irq(int irq, void *_dev)
>  		if (gotgint & GOTGINT_SES_END_DET) {
>  			debug_cond(DEBUG_ISR, "\t\tSession End Detected\n");
>  			/* Let gadget detect disconnected state */
> -			if (dev->driver->disconnect) {
> +			if (dev->driver && dev->driver->disconnect) {
>  				spin_unlock_irqrestore(&dev->lock, flags);
>  				dev->driver->disconnect(&dev->gadget);
>  				spin_lock_irqsave(&dev->lock, flags);
>
> ---
> base-commit: 9710d98e8942151fc0c62d54100d9d27e8263d04
> change-id: 20250929-usb_dwc2-924d0d26df62
>
> Best regards,
> -- 
> Andrew Goodbody <andrew.goodbody at linaro.org>