linux-kernel - Re: [PATCH 2/2] vdpa/mlx5: Initialize CVQ iotlb spinlock

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Date:   Mon, 13 Feb 2023 07:26:13 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Eli Cohen <elic@...dia.com>
Cc:     jasowang@...hat.com, si-wei.liu@...cle.com, eperezma@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] vdpa/mlx5: Initialize CVQ iotlb spinlock

On Mon, Feb 13, 2023 at 02:24:40PM +0200, Eli Cohen wrote:
> 
> On 13/02/2023 14:19, Michael S. Tsirkin wrote:
> > On Mon, Feb 06, 2023 at 02:20:16PM +0200, Eli Cohen wrote:
> > > Initialize itolb spinlock.
> > > 
> > > Fixes: 5262912ef3cf ("vdpa/mlx5: Add support for control VQ and MAC setting")
> > > Signed-off-by: Eli Cohen <elic@...dia.com>
> > threading was broken here but whatevs.
> What exactly do you mean by "threading was broken". Is it because I sent two
> unrelated fixes together appearing as patch 1/2 and 2/2?

exactly. if I see 2/2 I expect a thread so I can find 1/2
and preferably a cover letter explaining what unifies all
these patches.
If they are unrelated no need to number them.

> > 
> > > ---
> > >   drivers/vdpa/mlx5/core/resources.c | 1 +
> > >   1 file changed, 1 insertion(+)
> > > 
> > > diff --git a/drivers/vdpa/mlx5/core/resources.c b/drivers/vdpa/mlx5/core/resources.c
> > > index 45ad41287a31..d5a59c9035fb 100644
> > > --- a/drivers/vdpa/mlx5/core/resources.c
> > > +++ b/drivers/vdpa/mlx5/core/resources.c
> > > @@ -233,6 +233,7 @@ static int init_ctrl_vq(struct mlx5_vdpa_dev *mvdev)
> > >   	if (!mvdev->cvq.iotlb)
> > >   		return -ENOMEM;
> > > +	spin_lock_init(&mvdev->cvq.iommu_lock);
> > >   	vringh_set_iotlb(&mvdev->cvq.vring, mvdev->cvq.iotlb, &mvdev->cvq.iommu_lock);
> > >   	return 0;
> > > -- 
> > > 2.38.1