From: Vignesh Raghavendra <vigneshr@ti.com>
Date: Mon, 27 Jan 2020 12:25:54 +0000 (+0530)
Subject: usb: cdns3: ep0: Invalidate cache before reading Setup Packet
X-Git-Tag: v2020.04-rc2~20^2~1
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=bf16a7be90d5732279c454c10be1686ed79610be;p=oweals%2Fu-boot.git

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 <vigneshr@ti.com>
---

diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c
index 0b6d9cf727..f35a924839 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);