From 1e1be6d478c7c2cddf97e2623dd5c4c10bc23020 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Sat, 14 Dec 2013 02:03:11 +0100
Subject: usb: ehci: Do not de-init uninited controllers

In case the controller is not initialized, we shall not de-initialize it.
As the control structure will not be filled, we will produce a null ptr
dereference if the controller is not inited.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 8bd1eb8..3ef204d 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -201,6 +201,9 @@ static int ehci_shutdown(struct ehci_ctrl *ctrl)
 	int i, ret = 0;
 	uint32_t cmd, reg;
 
+	if (!ctrl || !ctrl->hcor)
+		return -EINVAL;
+
 	cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
 	cmd &= ~(CMD_PSE | CMD_ASE);
 	ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
-- 
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