From: Marek Vasut <marex@denx.de>
Date: Sat, 14 Dec 2013 01:03:11 +0000 (+0100)
Subject: usb: ehci: Do not de-init uninited controllers
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1e1be6d478c7c2cddf97e2623dd5c4c10bc23020;p=project%2Fbcm63xx%2Fu-boot.git

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 8bd1eb8a99..3ef204d6ab 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);