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usb: musb: Use delayed for musb_gadget_pullup

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We have MUSB setting pm_runtime_irq_safe with the following
commits:

30a70b026b ("usb: musb: fix obex in g_nokia.ko causing kernel panic")
3e43a07256 ("usb: musb: core: add pm_runtime_irq_safe()")

Let's fix things to use delayed work so we can remove the
pm_runtime_irq_safe.

Note that we may want to set this up in a generic way in the
gadget framework eventually.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2016-05-31 10:05:14 -05:00 committed by Greg Kroah-Hartman
parent 3064721790
commit 517bafffca
2 changed files with 19 additions and 6 deletions
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1
drivers/usb/musb/musb_core.h
View File

@ -312,6 +312,7 @@ struct musb {
struct work_struct irq_work;
struct delayed_work deassert_reset_work;
struct delayed_work finish_resume_work;
struct delayed_work gadget_work;
u16 hwvers;
u16 intrrxe;

24
drivers/usb/musb/musb_gadget.c
View File

@ -1656,6 +1656,20 @@ static int musb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
return usb_phy_set_power(musb->xceiv, mA);
}
static void musb_gadget_work(struct work_struct *work)
{
struct musb *musb;
unsigned long flags;
musb = container_of(work, struct musb, gadget_work.work);
pm_runtime_get_sync(musb->controller);
spin_lock_irqsave(&musb->lock, flags);
musb_pullup(musb, musb->softconnect);
spin_unlock_irqrestore(&musb->lock, flags);
pm_runtime_mark_last_busy(musb->controller);
pm_runtime_put_autosuspend(musb->controller);
}
static int musb_gadget_pullup(struct usb_gadget *gadget, int is_on)
{
struct musb *musb = gadget_to_musb(gadget);
@ -1663,20 +1677,16 @@ static int musb_gadget_pullup(struct usb_gadget *gadget, int is_on)
is_on = !!is_on;
pm_runtime_get_sync(musb->controller);
/* NOTE: this assumes we are sensing vbus; we'd rather
* not pullup unless the B-session is active.
*/
spin_lock_irqsave(&musb->lock, flags);
if (is_on != musb->softconnect) {
musb->softconnect = is_on;
musb_pullup(musb, is_on);
schedule_delayed_work(&musb->gadget_work, 0);
}
spin_unlock_irqrestore(&musb->lock, flags);
pm_runtime_put(musb->controller);
return 0;
}
@ -1845,7 +1855,7 @@ int musb_gadget_setup(struct musb *musb)
#elif IS_ENABLED(CONFIG_USB_MUSB_GADGET)
musb->g.is_otg = 0;
#endif
INIT_DELAYED_WORK(&musb->gadget_work, musb_gadget_work);
musb_g_init_endpoints(musb);
musb->is_active = 0;
@ -1866,6 +1876,8 @@ void musb_gadget_cleanup(struct musb *musb)
{
if (musb->port_mode == MUSB_PORT_MODE_HOST)
return;
cancel_delayed_work_sync(&musb->gadget_work);
usb_del_gadget_udc(&musb->g);
}