linux-kernel - Re: [PATCH v6 10/21] RDMA/umem: Prepare to dynamic dma-buf locking specification

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Date:   Mon, 10 Oct 2022 15:56:37 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Dmitry Osipenko <dmitry.osipenko@...labora.com>
Cc:     Leon Romanovsky <leon@...nel.org>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Dmitry Osipenko <digetx@...il.com>,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org,
        amd-gfx@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        kernel@...labora.com, virtualization@...ts.linux-foundation.org,
        linux-rdma@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        David Airlie <airlied@...ux.ie>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Daniel Almeida <daniel.almeida@...labora.com>,
        Gert Wollny <gert.wollny@...labora.com>,
        Gustavo Padovan <gustavo.padovan@...labora.com>,
        Daniel Stone <daniel@...ishbar.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Rob Clark <robdclark@...il.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Alex Deucher <alexander.deucher@....com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Thomas Hellström <thomas_os@...pmail.org>,
        Qiang Yu <yuq825@...il.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Amol Maheshwari <amahesh@....qualcomm.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        Tomi Valkeinen <tomba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Lucas Stach <l.stach@...gutronix.de>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        Ruhl Michael J <michael.j.ruhl@...el.com>
Subject: Re: [PATCH v6 10/21] RDMA/umem: Prepare to dynamic dma-buf locking
 specification

On Sun, Oct 09, 2022 at 03:08:56AM +0300, Dmitry Osipenko wrote:
> On 9/28/22 22:15, Dmitry Osipenko wrote:
> > Prepare InfiniBand drivers to the common dynamic dma-buf locking
> > convention by starting to use the unlocked versions of dma-buf API
> > functions.
> > 
> > Acked-by: Christian König <christian.koenig@....com>
> > Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
> > ---
> >  drivers/infiniband/core/umem_dmabuf.c | 7 ++++---
> >  1 file changed, 4 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/infiniband/core/umem_dmabuf.c b/drivers/infiniband/core/umem_dmabuf.c
> > index 04c04e6d24c3..43b26bc12288 100644
> > --- a/drivers/infiniband/core/umem_dmabuf.c
> > +++ b/drivers/infiniband/core/umem_dmabuf.c
> > @@ -26,7 +26,8 @@ int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf)
> >  	if (umem_dmabuf->sgt)
> >  		goto wait_fence;
> >  
> > -	sgt = dma_buf_map_attachment(umem_dmabuf->attach, DMA_BIDIRECTIONAL);
> > +	sgt = dma_buf_map_attachment_unlocked(umem_dmabuf->attach,
> > +					      DMA_BIDIRECTIONAL);
> >  	if (IS_ERR(sgt))
> >  		return PTR_ERR(sgt);
> >  
> > @@ -102,8 +103,8 @@ void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf)
> >  		umem_dmabuf->last_sg_trim = 0;
> >  	}
> >  
> > -	dma_buf_unmap_attachment(umem_dmabuf->attach, umem_dmabuf->sgt,
> > -				 DMA_BIDIRECTIONAL);
> > +	dma_buf_unmap_attachment_unlocked(umem_dmabuf->attach, umem_dmabuf->sgt,
> > +					  DMA_BIDIRECTIONAL);
> >  
> >  	umem_dmabuf->sgt = NULL;
> >  }
> 
> Jason / Leon,
> 
> Could you please ack this patch?

You probably don't need it, for something so simple, but sure

Acked-by: Jason Gunthorpe <jgg@...dia.com>

Jason