linux-kernel - Re: [PATCH v4 11/21] misc: fastrpc: Prepare to dynamic dma-buf locking specification

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Date:   Fri, 2 Sep 2022 10:31:24 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Dmitry Osipenko <dmitry.osipenko@...labora.com>,
        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>,
        Amol Maheshwari <amahesh@....qualcomm.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>,
        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>
Cc:     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
Subject: Re: [PATCH v4 11/21] misc: fastrpc: Prepare to dynamic dma-buf
 locking specification



On 31/08/2022 16:37, Dmitry Osipenko wrote:
> Prepare fastrpc to the common dynamic dma-buf locking convention by
> starting to use the unlocked versions of dma-buf API functions.
> 
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
> ---

LGTM,

Incase you plan to take it via another tree.

Acked-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>


--srini
>   drivers/misc/fastrpc.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
> index 93ebd174d848..6fcfb2e9f7a7 100644
> --- a/drivers/misc/fastrpc.c
> +++ b/drivers/misc/fastrpc.c
> @@ -310,8 +310,8 @@ static void fastrpc_free_map(struct kref *ref)
>   				return;
>   			}
>   		}
> -		dma_buf_unmap_attachment(map->attach, map->table,
> -					 DMA_BIDIRECTIONAL);
> +		dma_buf_unmap_attachment_unlocked(map->attach, map->table,
> +						  DMA_BIDIRECTIONAL);
>   		dma_buf_detach(map->buf, map->attach);
>   		dma_buf_put(map->buf);
>   	}
> @@ -726,7 +726,7 @@ static int fastrpc_map_create(struct fastrpc_user *fl, int fd,
>   		goto attach_err;
>   	}
>   
> -	map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL);
> +	map->table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL);
>   	if (IS_ERR(map->table)) {
>   		err = PTR_ERR(map->table);
>   		goto map_err;