diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index b3c065a..fb90d94 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -352,6 +352,8 @@ struct musb {
struct timer_list otg_timer;
struct notifier_block nb;
+ struct work_struct notify_work;
+ unsigned long event;
struct dma_controller *dma_controller;
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index ba85f27..a0fe317 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -223,11 +223,11 @@ static inline void omap2430_low_level_init(struct musb *musb)
musb_writel(musb->mregs, OTG_FORCESTDBY, l);
}
-/* blocking notifier support */
-static int musb_otg_notifications(struct notifier_block *nb,
- unsigned long event, void *unused)
+/* work function for atomic notifier */
+static void musb_otg_notify_work(struct work_struct *ws)
{
- struct musb *musb = container_of(nb, struct musb, nb);
+ struct musb *musb = container_of(ws, struct musb, notify_work);
+ unsigned long event = musb->event;
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *pdata = dev->platform_data;
struct omap_musb_board_data *data = pdata->board_data;@@ -274,8 +274,18 @@ static int musb_otg_notifications(struct notifier_block *nb,
break;
default:
dev_dbg(musb->controller, "ID float\n");
- return NOTIFY_DONE;
+ break;
}
+}
+
+static int musb_otg_notifications(struct notifier_block *nb,
+ unsigned long event,
+ void *unused)
+{
+ struct musb *musb = container_of(nb, struct musb, nb);
+
+ musb->event = event;
+ schedule_work(&musb->notify_work);
return NOTIFY_OK;
}@@ -323,6 +333,7 @@ static int omap2430_musb_init(struct musb *musb)
musb_readl(musb->mregs, OTG_INTERFSEL),
musb_readl(musb->mregs, OTG_SIMENABLE));
+ INIT_WORK(&musb->notify_work, musb_otg_notify_work);
musb->nb.notifier_call = musb_otg_notifications;
status = otg_register_notifier(musb->xceiv, &musb->nb);
@@ -386,6 +397,7 @@ static void omap2430_musb_disable(struct musb *musb)
static int omap2430_musb_exit(struct musb *musb)
{
del_timer_sync(&musb_idle_timer);
+ cancel_work_sync(&musb->notify_work);
omap2430_low_level_exit(musb);
otg_put_transceiver(musb->xceiv);