4.4-stable review patch. If anyone has any objections, please let me know.
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From: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com
commit b7d44c36a6f6d956e1539e0dd42f98b26e5a4684 upstream.
The commit b8b9c974afee ("usb: renesas_usbhs: gadget: disable all eps when the driver stops") causes the unused-but-set-variable warning. But, if the usbhsg_ep_disable() will return non-zero value, udc/core.c doesn't clear the ep->enabled flag. So, this driver should not return non-zero value, if the pipe is zero because this means the pipe is already disabled. Otherwise, the ep->enabled flag is never cleared when the usbhsg_ep_disable() is called by the renesas_usbhs driver first.
Fixes: b8b9c974afee ("usb: renesas_usbhs: gadget: disable all eps when the driver stops") Fixes: 11432050f070 ("usb: renesas_usbhs: gadget: fix NULL pointer dereference in ep_disable()") Signed-off-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/renesas_usbhs/mod_gadget.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
--- a/drivers/usb/renesas_usbhs/mod_gadget.c +++ b/drivers/usb/renesas_usbhs/mod_gadget.c @@ -641,14 +641,11 @@ static int usbhsg_ep_disable(struct usb_ struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); struct usbhs_pipe *pipe; unsigned long flags; - int ret = 0;
spin_lock_irqsave(&uep->lock, flags); pipe = usbhsg_uep_to_pipe(uep); - if (!pipe) { - ret = -EINVAL; + if (!pipe) goto out; - }
usbhsg_pipe_disable(uep); usbhs_pipe_free(pipe);