On Mon, 2 Nov 2015 10:27:00 +0100
Jiri Slaby wrote:
> Signed-off-by: Jiri Slaby
> --- a/drivers/usb/class/usblp.c
> +++ b/drivers/usb/class/usblp.c
> @@ -884,11 +884,11 @@ static int usblp_wwait(struct usblp *usblp, int
> nonblock)
>
> add_wait_queue(&usblp->wwait, &waita);
> for
It is not permitted to set task state before lock. usblp_wwait sets
the state to TASK_INTERRUPTIBLE and calls mutex_lock_interruptible.
Upon return from that function, the state will be TASK_RUNNING again.
This is clearly a bug and a warning is generated with LOCKDEP too:
WARNING: CPU: 1 PID: 5109
