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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>
This commit is contained in:
Marek Vasut 2013-12-14 02:03:11 +01:00
parent 8fb83547b9
commit 1e1be6d478
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/host/ehci-hcd.c
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@ -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);