We need a pm_runtime_get_sync() call from within musb_gadget_pullup() to make sure registers are accessible at that time. The problem is that musb_gadget_pullup() is called with IRQs disabled and, because of that, we need to tell pm_runtime that this pm_runtime_get_sync() is IRQ safe. Reported-by: Pali Rohár <pali.rohar@xxxxxxxxx> Signed-off-by: Felipe Balbi <balbi@xxxxxx> --- drivers/usb/musb/musb_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 34cce3e38c49..15bbf577c8ce 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1970,6 +1970,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) pm_runtime_use_autosuspend(musb->controller); pm_runtime_set_autosuspend_delay(musb->controller, 200); + pm_runtime_irq_safe(musb->controller); pm_runtime_enable(musb->controller); spin_lock_init(&musb->lock); -- 2.3.0-rc1 -- 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
