From: Dmitry Osipenko <dmitry.osipenko@collabora.com>
To: "Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>
Cc: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
linux-tegra@vger.kernel.org, kernel@collabora.com,
Benjamin Gaignard <benjamin.gaignard@collabora.com>,
Brian Starkey <Brian.Starkey@arm.com>,
John Stultz <jstultz@google.com>,
Gerd Hoffmann <kraxel@redhat.com>,
Daniel Vetter <daniel@ffwll.ch>,
Jani Nikula <jani.nikula@linux.intel.com>,
Arnd Bergmann <arnd@arndb.de>,
Thomas Zimmermann <tzimmermann@suse.de>,
Tomi Valkeinen <tomba@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
Tomasz Figa <tfiga@chromium.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Emil Velikov <emil.l.velikov@gmail.com>
Subject: Re: [PATCH v4 5/6] dma-buf: Change locking policy for mmap()
Date: Tue, 20 Jun 2023 18:58:13 +0300 [thread overview]
Message-ID: <1a04706a-caee-114c-6b6e-e4fdb815e619@collabora.com> (raw)
In-Reply-To: <91466907-d4e1-1619-27a8-a49a01cbc8f1@collabora.com>
On 5/31/23 22:58, Dmitry Osipenko wrote:
> On 5/30/23 01:39, Dmitry Osipenko wrote:
>> Change locking policy of mmap() callback, making exporters responsible
>> for handling dma-buf reservation locking. Previous locking policy stated
>> that dma-buf is locked for both importers and exporters by the dma-buf
>> core, which caused a deadlock problem for DRM drivers in a case of
>> self-imported dma-bufs which required to take the lock from the DRM
>> exporter side.
>>
>> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
>> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
>> ---
>> drivers/dma-buf/dma-buf.c | 17 +++--------------
>> 1 file changed, 3 insertions(+), 14 deletions(-)
>
> Christian, you acked the drm patch of this series sometime ago, perhaps
> it also implies implicit ack to this patch, but I'd prefer to have the
> explicit ack. I'll apply this series to drm-misc later this week if
> you'll approve this dma-buf change. Thanks in advance!
I'll merge the patches tomorrow. If there are any additional comments,
then please don't hesitate to post them.
--
Best regards,
Dmitry
next prev parent reply other threads:[~2023-06-20 15:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-29 22:39 [PATCH v4 0/6] Move dma-buf mmap() reservation locking down to exporters Dmitry Osipenko
2023-05-29 22:39 ` [PATCH v4 1/6] media: videobuf2: Don't assert held reservation lock for dma-buf mmapping Dmitry Osipenko
2023-05-29 22:39 ` [PATCH v4 2/6] dma-buf/heaps: " Dmitry Osipenko
2023-06-21 17:21 ` T.J. Mercier
2023-06-21 18:16 ` Dmitry Osipenko
2023-06-21 19:24 ` T.J. Mercier
2023-05-29 22:39 ` [PATCH v4 3/6] udmabuf: " Dmitry Osipenko
2023-05-29 22:39 ` [PATCH v4 4/6] drm: " Dmitry Osipenko
2023-05-29 22:39 ` [PATCH v4 5/6] dma-buf: Change locking policy for mmap() Dmitry Osipenko
[not found] ` <91466907-d4e1-1619-27a8-a49a01cbc8f1@collabora.com>
2023-06-20 15:58 ` Dmitry Osipenko [this message]
2023-06-21 5:42 ` Christian König
2023-06-21 18:17 ` Dmitry Osipenko
2023-05-29 22:39 ` [PATCH v4 6/6] drm/shmem-helper: Switch to reservation lock Dmitry Osipenko
2023-06-26 9:40 ` Boris Brezillon
2023-06-26 9:57 ` Boris Brezillon
2023-06-26 13:05 ` Dmitry Osipenko
2023-06-26 13:05 ` Dmitry Osipenko
2023-06-21 19:13 ` [PATCH v4 0/6] Move dma-buf mmap() reservation locking down to exporters Dmitry Osipenko
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