On 06.08.2013 19:49, Jörn Engel wrote: > On Tue, 6 August 2013 15:03:29 +0300, Jussi Kivilinna wrote: >> >> Patch fixes alauda not to use stack as URB transfer_buffer. URB buffers need >> to >> be DMA-able, which stack is not. >> >> Patch is only compile tested. > > I have tested the driver back when I wrote it. Not sure why it worked > then, maybe the chip in my notebook back then didn't care about > alignment or I just got lucky with the memory allocations.
You might not see problems with your hardware/architecture. "Documentation/DMA-API-HOWTO.txt" discusses about "What memory is DMA'able?". > > My old test hardware was likely thrown out in the last move, about two > years back. Performance sucked anyway, 400kB/s was the limit. Maybe > we should just remove the driver and not spend any more time on it? > > Jörn > > -- > Victory in war is not repetitious. > -- Sun Tzu > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
