On Thu, Dec 14, 2023 at 01:04:43PM +0200, Dmitry Baryshkov wrote: > On Thu, 14 Dec 2023 at 09:16, Johan Hovold <johan@xxxxxxxxxx> wrote: > > > > On Wed, Dec 13, 2023 at 01:06:43PM -0800, Rob Clark wrote: > > > From: Rob Clark <robdclark@xxxxxxxxxxxx> > > > > > > We need to bail out before adding/removing devices, if we are going > > > to -EPROBE_DEFER. Otherwise boot will get stuck forever at > > > deferred_probe_initcall(). > > > > Can please you expand on why this is a problem here in the commit > > message? > > > > The aux devices appear to be tore down correctly in the probe error > > paths so how exactly does that lead to deferred_probe_initcall() being > > stuck? This sounds like we may have a problem elsewhere which this patch > > is papering over. > > This is a known problem. Successful probes during the probe deferral > loop causes the whole loop to be reiterated. Creating child devices > usually results in a successful probe. Aso I thought that just > creating new device also causes a reprobe, but I can not find any > evidence now. This still needs to be described in the commit message. Only a successful probe should trigger a reprobe, and when the child devices are registered the parent is not yet on the deferred probe list. So something is not right or missing here. Johan
