On Wed, Mar 08, 2023 at 06:12:51PM +0000, Joakim Tjernlund wrote: > On Wed, 2023-03-08 at 18:25 +0100, Greg KH wrote: > > On Wed, Mar 08, 2023 at 05:10:17PM +0000, Joakim Tjernlund wrote: > > > we are using fsl-ls1043a-rdb based design but with a ls1023a SOC and > > > use USB0 in gadget mode running either NCM or RNDIS ethernet on top. > > > > > > When we connect the gadget to a PC(Linux of Windows) over an USB2 hub, > > > networking(NCM or RNDIS) works well. > > > > > > However, when we connect the gadget directly to the PC/laptop which uses USB3 > > > we see something odd: > > > Ping from PC to gadget works. > > > Ping from gadget to laptop does not. However if we also ping from PC at the same time we > > > see gadget to PC start working. > > > Seems like ping from the PC tiggers the gadget to see incoming pkgs somehow. > > > > > > Any idea what might be wrong or how to debug this? > > > Kernel 5.15.87 > > > > 5.15.y is very old, does this also happen on 6.2? > > > > I just tried 6.1.15 and the problem remains, I hope that is close enough ? It's good enough :) Have any logs at all that show any problems? Also, you might want to cc: the dwc3 maintainer... thanks, greg k-hj
