[PATCH] usb: cdns3: ep0: Invalidate cache before reading Setup Packet

[Marek Vasut]

On 1/27/20 1:25 PM, Vignesh Raghavendra wrote:
> Invalidate dcache line before accessing Setup Packet contents. Otherwise
> driver will see stale content on non coherent architecture.
> 
> Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
> ---
>  drivers/usb/cdns3/ep0.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c
> index 0b6d9cf7274e..f35a92483948 100644
> --- a/drivers/usb/cdns3/ep0.c
> +++ b/drivers/usb/cdns3/ep0.c
> @@ -562,6 +562,10 @@ static void cdns3_ep0_setup_phase(struct cdns3_device *priv_dev)
>  	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
>  	int result;
>  
> +	/* Invalidate Setup Packet received */
> +	invalidate_dcache_range(priv_dev->setup_dma,
> +				priv_dev->setup_dma + ARCH_DMA_MINALIGN);
> +
>  	priv_dev->ep0_data_dir = ctrl->bRequestType & USB_DIR_IN;
>  
>  	trace_cdns3_ctrl_req(ctrl);
> 

Applied, thanks.