From: Neil Zhang <zhangwm@xxxxxxxxxxx> Some platforms will use usb to download images, the controller may not be stopped correctly when start kernel. In some cases, it may have some pending interrupts, and they will be triggered immediately when we finish requesting irq in function probe. But we haven't finished the device initialization at this time. So let's stop udc here to avoid this case occurred. Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx> Signed-off-by: Felipe Balbi <balbi@xxxxxx> --- drivers/usb/gadget/mv_udc_core.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c index cd4de00..8465528 100644 --- a/drivers/usb/gadget/mv_udc_core.c +++ b/drivers/usb/gadget/mv_udc_core.c @@ -2037,6 +2037,13 @@ static int __devinit mv_udc_probe(struct platform_device *dev) & CAPLENGTH_MASK)); udc->max_eps = readl(&udc->cap_regs->dccparams) & DCCPARAMS_DEN_MASK; + /* + * some platform will use usb to download image, it may not disconnect + * usb gadget before loading kernel. So first stop udc here. + */ + udc_stop(udc); + writel(0xFFFFFFFF, &udc->op_regs->usbsts); + size = udc->max_eps * sizeof(struct mv_dqh) *2; size = (size + DQH_ALIGNMENT - 1) & ~(DQH_ALIGNMENT - 1); udc->ep_dqh = dma_alloc_coherent(&dev->dev, size, -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
