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usb: cdns3: ep0: Invalidate cache before reading Setup Packet
author
Vignesh Raghavendra
<vigneshr@ti.com>
Mon, 27 Jan 2020 12:25:54 +0000
(17:55 +0530)
committer
Marek Vasut
<marek.vasut+renesas@gmail.com>
Sun, 2 Feb 2020 17:19:52 +0000
(18:19 +0100)
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>
drivers/usb/cdns3/ep0.c
patch
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diff --git
a/drivers/usb/cdns3/ep0.c
b/drivers/usb/cdns3/ep0.c
index
0b6d9cf
..
f35a924
100644
(file)
--- 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);