2012년 10월 30일 화요일 오전 4시 26분 35초 UTC+9, Ryan Leonard 님의 말: > > Hello all, > > My question is, is it possible to build the linux kernel for an android > device without the usb gadget driver built-in? My motivation and what I > have tried thus far is listed below. > > I am attempting to emulate the behavior of connecting and disconnecting an > android phone from a given host. I have looked through many methods to try > to emulate this behavior, and the solution I am working on now is: > 1. build a kernel WITHOUT support for usb gadget > 2. build a kernel module that supports usb gadget > 3. put together an application to insmod/rmmod the resulting kernel module > > I have done all three parts, and now I am seeing kernel panics. In > particular there are two actions that result in kernel panics > 1. Plug android device WITHOUT usb gadget support into a host (the > enumeration must be causing the panic) > 2. insmod and rmmod the kernel module, then insmod it again (kernel module > name is android.ko and the resulting kernel log messages that happen just > before panic are below) > [ 257.163085] sysfs: cannot create duplicate filename > '/devices/platform/omap/musb-omap2430/musb-hdrc/gadget/lun0' > [ 257.163177] Modules linked in: android(+) [last unloaded: android] > > I am working with the Samsung Galaxy Nexus. I have verified the kernel > building process and the module building process by making a stock kernel > and a simple kernel module. So the issue IS particularly with the usb > gadget driver module and/or the kernel without built-in android gadget usb. > > Best, > Ryan Leonard >
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