On Thu, 2019-09-26 at 21:55 +0200, gregkh@linuxfoundation.org wrote: > On Thu, Sep 26, 2019 at 07:49:44PM +0000, Saleem, Shiraz wrote: > > > Subject: Re: [RFC 20/20] RDMA/i40iw: Mark i40iw as deprecated > > > > > > On Thu, Sep 26, 2019 at 09:45:19AM -0700, Jeff Kirsher wrote: > > > > From: Shiraz Saleem > > > > > > > > Mark i40iw as deprecated/obsolete. > > > > > > > > irdma is the replacement driver that supports X722. > > > > > > Can you simply delete old one and add MODULE_ALIAS() in new > > > driver? > > > > > > > Yes, but we thought typically driver has to be deprecated for a few > > cycles before removing it. > > If you completely replace it with something that works the same, why > keep the old one around at all? > > Unless you don't trust your new code? :) I have yet to see, in over 20 years of kernel experience, a new driver replace an old driver and not initially be more buggy and troublesome than the old driver. It takes time and real world usage for the final issues to get sorted out. During that time, the fallback is often necessary for those real world users. -- Doug Ledford GPG KeyID: B826A3330E572FDD Fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD