On Mon, Apr 15, 2019 at 5:40 PM Andrzej Pietrasiewicz <andrzejtp2010@xxxxxxxxx> wrote: > > Hi Peter, > > <snip> > > >> > >> Can you please describe your use case? > >> > >> Andrzej > > > > I would like to change parameters for function driver through configfs, below is the example for ncm and f_sourcesink cases, > > thanks. > > > > if [ "$FUNC" == "ncm" ]; then > > mkdir functions/$FUNC".0" > > ln -s functions/$FUNC".0" configs/c.1 > > echo 10 > functions/ncm.0/qmult > > echo "12:a5:cf:42:92:fd" > functions/ncm.0/host_addr > > echo "5e:bc:ca:27:92:b1" > functions/ncm.0/dev_addr > > fi > > > > if [ "$FUNC" == "ss" ]; then > > cd /sys/kernel/config/usb_gadget > > cd g1 > > echo "0x0525" > idVendor > > echo "0xa4a0" > idProduct > > export FUNC="SourceSink" > > mkdir functions/$FUNC".0" > > ln -s functions/$FUNC".0" configs/c.1 > > cd functions/$FUNC".0" > > echo 1 > pattern > > echo 1 > isoc_interval > > echo 1024 > isoc_maxpacket > > echo 2 > isoc_mult > > #isoc_maxburst > > echo 1024 > bulk_buflen > > echo 16 > bulk_qlen > > echo 16 > iso_qlen > > fi > > > > Peter > > > > > I think I don't quite understand the problem: just postpone issuing > ln -s until after echo <something> > <configfs attribute>. > Andrzej, thank you very much. My problem can be fixed by your suggestion. Peter
