[PATCH] i3c: master: add WQ_PERCPU to alloc_workqueue users

[Alexandre Belloni]

On 10/11/2025 12:00:48-0500, Frank Li wrote:
> On Fri, Nov 07, 2025 at 11:28:30PM +0100, Sebastian Andrzej Siewior wrote:
> > On 2025-11-07 16:00:06 [-0500], Frank Li wrote:
> > > > diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
> > > > index d946db75df70..519b98c37ac7 100644
> > > > --- a/drivers/i3c/master.c
> > > > +++ b/drivers/i3c/master.c
> > > > @@ -2925,7 +2925,7 @@ int i3c_master_register(struct i3c_master_controller *master,
> > > >  	if (ret)
> > > >  		goto err_put_dev;
> > > >
> > > > -	master->wq = alloc_workqueue("%s", 0, 0, dev_name(parent));
> > > > +	master->wq = alloc_workqueue("%s", WQ_PERCPU, 0, dev_name(parent));
> > >
> > > Maybe off topic, I think it is not neccesary to create wq for IBI at all.
> > > it can directly use system_bh_wq, or other wq.
> >
> > Do you really meant system_bh_wq or would system_unbound_wq do the job?
> > The _bh_ one would imply softirq usage, I don't think you want that.
> 
> My major means is that not neccessary to alloc a work queue for IBI. Use
> one of system predefined should be enough. system_unbound_wq is good
> candidate.
> 

I don't agree because you may want to be able to prioritize handling
IBIs vs other work so I believe it makes sense to have a separate
workqueue.

> Your change is also good, let's wait for more reviewer's comments.
> 
> Frank
> 
> >
> > > Frank
> >
> > Sebastian

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com