Hi,
On Mon, Jul 07, 2014 at 12:53:45PM +0200, Michael Grzeschik wrote:
> Hi,
>
> I am currently working with an udc where the userspace should react on plugging
which udc is that ? which kernel version are you using ?
> and unplugging of the device. The layers used trigger the usb_gadget_state_work
> as expected, but the sysfs_notify never cross the userspace layer.
>
>
> static void usb_gadget_state_work(struct work_struct *work)
> {
> struct usb_gadget *gadget = work_to_gadget(work);
>
> sysfs_notify(&gadget->dev.kobj, NULL, "state");
> }
>
> When I create my own device attribute and call this function on it, everything
> works fine and my test application reacts on the event.
>
> I thing we mess with an regression where the attribute is not found in
huh ? Can you clarify what you mean here ?
> sysfs_notify. I see that kernfs_find_and_get is returning NULL and therefor
> never call kernfs_notify.
this would mean 'state' attribute was not found. Are you sure you can
find it on sysfs manually ?
> Does anybody know what could be the matter here?
--
balbi
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