Hi Paul, On Wed, Feb 01, 2023 at 01:32:51PM +0000, Paul Cercueil wrote: > Hi Sascha, Greg, > > I have a breakage in 6.2-rc* that I eventually bisected to this commit, > on a Ingenic SoC (using the jz4740 musb driver) with ECM or RNDIS > configured through gadgetfs. > > When plugging the board to my PC, the USB network interface is > recognized, but 'ip link' sees it as 'NO-CARRIER'. With this commit > reverted on v6.2-rc5, everything works fine. I don't have this hardware available. I just tried with a i.MX hardware and it works as expected. I have no idea where the jz4740 musb could behave differently. Here's exactly what I did: mkdir -p /sys/kernel/config/usb_gadget/mygadget cd /sys/kernel/config/usb_gadget/mygadget mkdir -p configs/c.1/strings/0x409 echo "C1:Composite Device" > configs/c.1/strings/0x409/configuration mkdir -p functions/ecm.usb0 ln -s functions/ecm.usb0 configs/c.1/ echo "ci_hdrc.0" > UDC Did you do something differently apart from the "ci_hdrc.0" of course? BTW when you say 'NO-CARRIER' is it on the PC side, board side, or both? It would be great if we could sort this out, but if not I am fine with reverting this patch. I guess this topic will come back to my desk sooner or later then Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
