Messages in this thread | | | Date | Fri, 22 May 2015 13:52:27 +0300 | From | Heikki Krogerus <> | Subject | Re: [PATCH] usb: ulpi: don't register drivers if bus doesn't exist |
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On Fri, May 22, 2015 at 01:16:38PM +0300, Heikki Krogerus wrote: > > > >>diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c > > > >>index 0e6f968..0b0a5e7 100644 > > > >>--- a/drivers/usb/common/ulpi.c > > > >>+++ b/drivers/usb/common/ulpi.c > > > >>@@ -132,6 +132,10 @@ int ulpi_register_driver(struct ulpi_driver *drv) > > > >> if (!drv->probe) > > > >> return -EINVAL; > > > >>+ /* Was the bus registered successfully? */ > > > >>+ if (!ulpi_bus.p) > > > >>+ return -ENODEV; > > > > I think we need to warn in this case. How about: > > > > if (unlikely(WARN_ON(!ulpi_bus.p))) > > return -ENODEV; > > I think we should also return -EAGAIN here.
The same check needs to be added to ulpi_register_interface() as well.
Cheers,
-- heikki
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