some platform will use usb to download image, it may not disconnect usb gadget in uboot before loading kernel. So first stop udc here to ensure that udc is stopped before we probe the device in kernel. Change-Id: I498a093d7c8dadb58c0d8fa7991ab4c567c76911 Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx> --- 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 dcd9352..54ea824 100644 --- a/drivers/usb/gadget/mv_udc_core.c +++ b/drivers/usb/gadget/mv_udc_core.c @@ -2043,6 +2043,13 @@ 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, -- 1.7.1 -- 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
