usb: gadgetfs: return number of bytes on ep0 read request
A read from GadgetFS endpoint 0 during the data stage of a control request would always return 0 on success (as returned by wait_event_interruptible) despite having written data into the user buffer. This patch makes it correctly set the return value to the number of bytes read. Signed-off-by: NThomas Faber <thfabba@gmx.de> Cc: stable <stable@vger.kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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