On Sat, Aug 18, 2012 at 10:18:01AM -0700, Kevin Cernekee wrote:
This is a quick look :)
> diff --git a/drivers/usb/gadget/bcm63xx_udc.c b/drivers/usb/gadget/bcm63xx_udc.c
> new file mode 100644
> index 0000000..da68f43
> --- /dev/null
> +++ b/drivers/usb/gadget/bcm63xx_udc.c
<snip>
> +static irqreturn_t bcm63xx_udc_data_isr(int irq, void *dev_id)
> +{
> + struct bcm63xx_udc *udc = dev_id;
> + struct bcm63xx_ep *bep;
> + struct iudma_ch *iudma = NULL;
> + struct usb_request *req = NULL;
> + struct bcm63xx_req *breq = NULL;
> + int is_done = 0, rc, i;
> +
> + spin_lock(&udc->lock);
> +
> + for (i = 0; i < NUM_IUDMA; i++)
> + if (udc->iudma[i].irq == irq)
> + iudma = &udc->iudma[i];
> + BUG_ON(!iudma);
This is rough. Please don't do this. Bail out in probe or print an error here
and return with IRQ_NONE and time will close this irq.
<snip>
> +static int __devinit bcm63xx_udc_probe(struct platform_device *pdev)
> +{
<snip>
> + for (i = 0; i < NUM_IUDMA + 1; i++) {
> + int irq = platform_get_irq(pdev, i);
> + if (irq < 0) {
> + dev_err(dev, "missing IRQ resource #%d\n", i);
> + goto out_uninit;
> + }
> + if (devm_request_irq(dev, irq,
> + i ? &bcm63xx_udc_data_isr : &bcm63xx_udc_ctrl_isr,
> + 0, dev_name(dev), udc) < 0) {
> + dev_err(dev, "error requesting IRQ #%d\n", irq);
> + goto out_uninit;
> + }
> + if (i > 0)
> + udc->iudma[i - 1].irq = irq;
> + }
According to this code, i in iudma[] can be in 1..5. You could have more than
one IRQ. The comment above this for loop is point less. So I think if you can
only have _one_ idma irq than you could remove the for loop in
bcm63xx_udc_data_isr().
Sebastian
