[PATCH] usb/gadget: fix poller NPE in early polling

[Jean-Christophe PLAGNIOL-VILLARD]

On 21:17 Wed 18 Jan     , Robert Jarzmik wrote:
> The timings of the poller calling have changed, digging out
> a latent bug in pxa27x udc controller.
> The polling routine is called before the probe function is
> called, and the driver internal are not initialized at that
> time. This triggers a NULL pointer exception.
> 
> Fix it by adding an extra check.
> 
> Signed-off-by: Robert Jarzmik <robert.jarzmik at free.fr>
> ---
>  drivers/usb/gadget/pxa27x_udc.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
> index d0dbee9..bde9e74 100644
> --- a/drivers/usb/gadget/pxa27x_udc.c
> +++ b/drivers/usb/gadget/pxa27x_udc.c
> @@ -1508,7 +1508,10 @@ static struct driver_d udc_driver = {
>  
>  static int pxa27x_udc_poller(struct poller_struct *poller)
>  {
> -	return usb_gadget_poll();
> +	if (the_controller)
> +		return usb_gadget_poll();
> +	else
> +		return 0;
>  }
instead of this register thee poll at the probe

Best Regards,
J.