[dpdk-dev] [PATCH] dev: don't fail the hotplug request if device is attached in secondary

[Thomas Monjalon]

> > Consider the following scenario:
> > 
> >  1) primary process (A) starts, probes the bus
> >  2) a secondary process (B) starts, probes the bus
> >  3) yet another secondary process (C) starts
> >  4) (C) registers the pci driver and hotplugs the device
> >     * an IPC attach req is sent to the primary (A)
> >       * (A) ignores the -EEXIST from process-local probe
> >       * (A) propagates the request to all secondary processes
> >         * (B) responds with -EEXIST
> >       * (A) replies to the original request with the -EEXIST
> >         return code
> >     * the -EEXIST is returned back to the user, although the
> >       device was successfully attached both locally and in
> >       all other processes
> > 
> > This patch makes the primary process reply with rc=0 even if there was another
> > secondary process with the device already attached. The primary process
> > already didn't reply with -EEXIST when the device was attached locally, so now
> > this behavior is even more consistent. Looking by the code, this seems to be the
> > originally intended behavior.
> > 
> > Fixes: ac9e4a17370f ("eal: support attach/detach shared device from
> > secondary")
> > Cc: qi.z.zhang at intel.com
> > 
> > Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk at intel.com>
> 
> Acked-by: Qi Zhang <qi.z.zhang at intel.com>

Applied, thanks