On Wed, Sep 21, 2022 at 10:28:57AM +0800, Cheng Xu wrote: > > > On 9/20/22 7:32 PM, Leon Romanovsky wrote: > > On Fri, Sep 09, 2022 at 05:38:22PM +0800, Cheng Xu wrote: > >> Hardware now support jumbo frame for RDMA. So we introduce a new CMDQ > >> message to support mtu change notification. > >> > <...> > > > > I don't see any backward compatibility here. How can you make sure that > > new code that supports MTU change works correctly on old FW/device? > > > > In this case, driver needn't to consider backward compatibility. > > ERDMA hardware is programmable part of our iaas infrastructure, and can be > hot-update without BMs/VMs awareness.Before I submitted this patch, all the > FWs has been updated, and support this feature, no old FWs exist. I'm not big fan of such answers, but ok, applied. > > Thanks, > Cheng Xu > >
