diff options
| author | Marek Vasut <marex@denx.de> | 2013-12-14 02:03:11 +0100 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2013-12-18 19:53:19 +0100 |
| commit | 1e1be6d478c7c2cddf97e2623dd5c4c10bc23020 (patch) | |
| tree | 6781728fbd8a026d88f0e614cdcba625a36bd7e3 /drivers | |
| parent | 8fb83547b93cd30a803eca1fec005b3d2b86a21f (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 3 |
1 files changed, 3 insertions, 0 deletions
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); |