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SubjectRe: [PATCH v3] usb: gadget: Add UDC driver for Aeroflex Gaisler GRUSBDC
Hi,

On Wed, Dec 04, 2013 at 09:13:58AM +0100, Andreas Larsson wrote:
> +static void gr_finish_request(struct gr_ep *ep, struct gr_request *req,
> + int status)
> +{
> + struct gr_udc *dev;
> +
> + list_del_init(&req->queue);
> +
> + if (likely(req->req.status == -EINPROGRESS))
> + req->req.status = status;
> + else
> + status = req->req.status;
> +
> + dev = ep->dev;
> + usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in);
> + gr_free_dma_desc_chain(dev, req);
> +
> + if (ep->is_in) /* For OUT, actual gets updated bit by bit */
> + req->req.actual = req->req.length;
> +
> + if (!status) {
> + if (ep->is_in)
> + gr_dbgprint_request("SENT", ep, req);
> + else
> + gr_dbgprint_request("RECV", ep, req);
> + }
> +
> + /* Prevent changes to ep->queue during callback */
> + ep->callback = 1;
> + if (req == dev->ep0reqo && !status) {
> + if (req->setup)
> + gr_ep0_setup(dev, req);
> + else
> + dev_err(dev->dev,
> + "Unexpected non setup packet on ep0in\n");
> + } else if (req->req.complete) {
> + unsigned long flags;
> +
> + /*
> + * Complete should be called with interrupts disabled according
> + * to the contract of struct usb_request
> + */
> + local_irq_save(flags);

sorry but this driver isn't ready for inclusion. local_irq_save() is a
pretty good hint that there's something wrong in the driver. Consider
the fact that local_irq_save() will disable preemption even when
CONFIG_PREEMPT_FULL is enabled and you have a bit a problem.

Also, the way you're using thread IRQs is quite wrong. I can't let that
pass and get merged upstream, sorry.

--
balbi
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