[U-Boot] [PATCH 2/3] usb: ehci: Do not de-init uninited controllers

[Marek Vasut]

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 at denx.de>
Cc: Simon Glass <sjg at chromium.org>
---
 drivers/usb/host/ehci-hcd.c | 3 +++
 1 file changed, 3 insertions(+)

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);
-- 
1.8.4.3