[RESEND PATCH] usb: mtu3: flush cache for the first GPD when allocate GPD ring

[Chunfeng Yun]

Hi Marek,

On Thu, 2021-10-21 at 13:33 +0800, Chunfeng Yun wrote:
> When allocate the GPD ring, and tell its address to the controller,
> then
> the driver starts or resumes the QMU, the controller will try to
> access
> the first GPD, so need flush the first one to avoid wrong GPD status.
> 
> Reported-by: Xin Lin <Xin.Lin at mediatek.com>
> Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>
> ---
>  drivers/usb/mtu3/mtu3_qmu.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/mtu3/mtu3_qmu.c
> b/drivers/usb/mtu3/mtu3_qmu.c
> index 95eaf6d236..e8dc0095ab 100644
> --- a/drivers/usb/mtu3/mtu3_qmu.c
> +++ b/drivers/usb/mtu3/mtu3_qmu.c
> @@ -112,6 +112,7 @@ int mtu3_gpd_ring_alloc(struct mtu3_ep *mep)
>  	memset(gpd, 0, QMU_GPD_RING_SIZE);
>  	ring->dma = (dma_addr_t)gpd;
>  	gpd_ring_init(ring, gpd);
> +	mtu3_flush_cache((uintptr_t)gpd, sizeof(*gpd));
>  
>  	return 0;
>  }
Could you please pick up this patch?

Thanks