From: Felipe Balbi <balbi@ti.com>
Date: Mon, 7 Apr 2014 15:58:01 +0000 (-0500)
Subject: usb: musb: omap2430: make sure clocks are enabled when running mailbox
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=8b2bc2c9351b4c09bc3d9096e2a7af3988565dbf;p=deliverable%2Flinux.git

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 819a7cdcb866..d369bf1f3936 100644
--- 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)