usb: musb: omap2430: make sure clocks are enabled when running mailbox

on early initialization we could fall into
a situation where the mailbox is called before
MUSB's clocks are running, in order to avoid
that, make sure mailbox is always wrapped with
pm_runtime calls.

Reported-by: Stefan Roese <sr@denx.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 819a7cdcb8664ef61cf8742ae3577e5a17dd79d0..d369bf1f3936cba910de97a4859c27174dbed8a5 100644 (file)
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -316,7 +316,13 @@ static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
 {
        struct omap2430_glue *glue = container_of(mailbox_work,
                                struct omap2430_glue, omap_musb_mailbox_work);
+       struct musb *musb = glue_to_musb(glue);
+       struct device *dev = musb->controller;
+
+       pm_runtime_get_sync(dev);
        omap_musb_set_mailbox(glue);
+       pm_runtime_mark_last_busy(dev);
+       pm_runtime_put_autosuspend(dev);
 }
 
 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)