Re: [PATCH] usb: chipidea: fix RT issue for udc

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Tue, Aug 10, 2021 at 03:02:28PM +0900, Jeaho Hwang wrote:
> hw_ep_prime sometimes fails if irq occurs while it rus on RT kernel.
> to prevent local_irq_save should keep the function from irqs.
> 
> I am not sure where is the best to submit this patch, between RT and USB
> community so sending to both. thanks.
> 
> Signed-off-by: Jeaho Hwang <jhhwang@rtst.co.kr>
> ---
>  drivers/usb/chipidea/udc.c | 31 +++++++++++++++++++++++++------
>  1 file changed, 25 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> index 5f35cdd2cf1d..a90498f17cc4 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
> @@ -102,6 +102,9 @@ static int hw_ep_flush(struct ci_hdrc *ci, int num, int dir)
>  {
>  	int n = hw_ep_bit(num, dir);
>  
> +    /* From zynq-7000 TRM, It can take a long time
> +     * so irq disable is not a good option for RT
> +     */

Please use checkpatch.pl when submitting patches :(