From bf16a7be90d5732279c454c10be1686ed79610be Mon Sep 17 00:00:00 2001 From: Vignesh Raghavendra Date: Mon, 27 Jan 2020 17:55:54 +0530 Subject: [PATCH] usb: cdns3: ep0: Invalidate cache before reading Setup Packet Invalidate dcache line before accessing Setup Packet contents. Otherwise driver will see stale content on non coherent architecture. Signed-off-by: Vignesh Raghavendra --- 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 0b6d9cf7274..f35a9248394 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);