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List:       linux-usb
Subject:    USB gadget API framework with gadgetfs
From:       postme1 () gmx ! net
Date:       2008-10-31 10:35:49
Message-ID: 20081031103549.16930 () gmx ! net
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I am using the USB gadget API framework with gadgetfs together with the example \
usermode driver usb.c [http://www.linux-usb.org/gadget/].  My target platform is an \
i.MX31 ARM11 with a arc_udc controller driver.  The example usermode driver was \
modified to be started as a thread, it is NOT the original standalone driver.  The \
normal execution of the usermode driver works fine, but for us it is necessary to \
terminate and restart usb-endpoint-pthreads (source, sink, ep0) because we need to \
disconnect USB during application runtime. In some cases arc_udc isn't able to unload \
gadgetfs("Device or resource busy"). The sticking point from my point of view is \
terminating endpoint0. Has anyone got similar constellation/problems/experience?
Can someone point me in the right direction to avoid the "Device or resource busy" \
error? Is there a way of querying the state (busy/free) of the gadgetfs from \
usermode?

Thanks in advance.
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