[PATCH v1] HSD #18028953892: usb: xhci-dwc3: Fix USB3.1 controller register access in reset state

[Jit Loon Lim]

From: Teik Heng Chong <teik.heng.chong at intel.com>

The controller registers should not be accessed while the controller's
vcc_reset_n is asserted.

Signed-off-by: Teik Heng Chong <teik.heng.chong at intel.com>
---
 drivers/usb/host/xhci-dwc3.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 1dbd65dfaa..3172956bd6 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -227,6 +227,11 @@ static int xhci_dwc3_probe(struct udevice *dev)
 static int xhci_dwc3_remove(struct udevice *dev)
 {
 	struct xhci_dwc3_plat *plat = dev_get_plat(dev);
+	int ret;
+
+	ret = xhci_deregister(dev);
+	if (ret)
+		return ret;
 
 	dwc3_shutdown_phy(dev, &plat->phys);
 
@@ -234,7 +239,7 @@ static int xhci_dwc3_remove(struct udevice *dev)
 
 	reset_release_bulk(&plat->resets);
 
-	return xhci_deregister(dev);
+	return 0;
 }
 
 static const struct udevice_id xhci_dwc3_ids[] = {
-- 
2.26.2