linux-kernel - Re: of c4iw_fill_res_qp

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Message-ID: <ZwQP-xESyiBDlyro@gallifrey>
Date: Mon, 7 Oct 2024 16:44:43 +0000
From: "Dr. David Alan Gilbert" <linux@...blig.org>
To: Leon Romanovsky <leon@...nel.org>
Cc: maorg@...dia.com, bharat@...lsio.com, jgg@...pe.ca,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: of c4iw_fill_res_qp_entry

* Leon Romanovsky (leon@...nel.org) wrote:
> On Sun, Oct 06, 2024 at 02:28:20PM +0000, Dr. David Alan Gilbert wrote:
> > * Leon Romanovsky (leon@...nel.org) wrote:
> > > On Fri, Oct 04, 2024 at 02:16:08PM +0000, Dr. David Alan Gilbert wrote:
> > > > Hi,
> > > >   One of my scripts noticed that c4iw_fill_res_qp_entry is not called
> > > > anywhere; It came from:
> > > > 
> > > > commit 5cc34116ccec60032dbaa92768f41e95ce2d8ec7
> > > > Author: Maor Gottlieb <maorg@...lanox.com>
> > > > Date:   Tue Jun 23 14:30:38 2020 +0300
> > > > 
> > > >     RDMA: Add dedicated QP resource tracker function
> > > >     
> > > > I was going to send a patch to deadcode it, but is it really a bug and
> > > > it should be assigned in c4iw_dev_ops in cxgb4/provider.c ?
> > > > 
> > > > (Note I know nothing about the innards of your driver, I'm just spotting
> > > > the unused function).
> > 
> > Thanks for the reply,
> > 
> > > It is a bug, something like that should be done.
> > 
> > Ah good I spotted; out of curiosity, what would be the symptom?
> 
> User will run "rdma resource show qp -d" and won't get any vendor
> specific information.

Oh OK, not terrible.

> > 
> > I don't have the hardware to test this, can I suggest that you send that patch?
> 
> Sure, will do.

Thanks!

Dave

> > 
> > Dave
> > 
> > > diff --git a/drivers/infiniband/hw/cxgb4/provider.c b/drivers/infiniband/hw/cxgb4/provider.c
> > > index 10a4c738b59f..e059f92d90fd 100644
> > > --- a/drivers/infiniband/hw/cxgb4/provider.c
> > > +++ b/drivers/infiniband/hw/cxgb4/provider.c
> > > @@ -473,6 +473,7 @@ static const struct ib_device_ops c4iw_dev_ops = {
> > >         .fill_res_cq_entry = c4iw_fill_res_cq_entry,
> > >         .fill_res_cm_id_entry = c4iw_fill_res_cm_id_entry,
> > >         .fill_res_mr_entry = c4iw_fill_res_mr_entry,
> > > +       .fill_res_qp_entry = c4iw_fill_res_qp_entry,
> > >         .get_dev_fw_str = get_dev_fw_str,
> > >         .get_dma_mr = c4iw_get_dma_mr,
> > >         .get_hw_stats = c4iw_get_mib,
> > > (END)
> > > 
> > > 
> > > > 
> > > > Thoughts?
> > > > 
> > > > Dave
> > > > -- 
> > > >  -----Open up your eyes, open up your mind, open up your code -------   
> > > > / Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
> > > > \        dave @ treblig.org |                               | In Hex /
> > > >  \ _________________________|_____ http://www.treblig.org   |_______/
> > > > 
> > > 
> > -- 
> >  -----Open up your eyes, open up your mind, open up your code -------   
> > / Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
> > \        dave @ treblig.org |                               | In Hex /
> >  \ _________________________|_____ http://www.treblig.org   |_______/
> 
-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\        dave @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/