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USB: musb: do not work if no gadget driver is loaded

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On OTG and gadget-only configurations, we need a gadget driver
in order to work properly, so avoid changing operation modes
when there's no gadget driver loaded.

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Felipe Balbi 2009-12-15 13:47:30 +02:00 committed by Greg Kroah-Hartman
parent d4c433fe6f
commit cd42fef0a0
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/musb/musb_core.c
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@ -1521,6 +1521,14 @@ irqreturn_t musb_interrupt(struct musb *musb)
(devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
musb->int_usb, musb->int_tx, musb->int_rx);
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
if (!musb->gadget_driver) {
DBG(5, "No gadget driver loaded\n");
return IRQ_HANDLED;
}
#endif
/* the core can interrupt us for multiple reasons; docs have
* a generic interrupt flowchart to follow
*/