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Message-ID: <20240529093216.6640d05d@collabora.com>
Date: Wed, 29 May 2024 09:32:16 +0200
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Adrián Larumbe <adrian.larumbe@...labora.com>
Cc: Rob Herring <robh@...nel.org>, Steven Price <steven.price@....com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard
<mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie
<airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, Sumit Semwal
<sumit.semwal@...aro.org>, Christian König
<christian.koenig@....com>, Dmitry Osipenko
<dmitry.osipenko@...labora.com>, Zack Rusin <zack.rusin@...adcom.com>,
kernel@...labora.com, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v4 0/3] drm: Fix dma_resv deadlock at drm object pin
time
On Thu, 23 May 2024 12:32:16 +0100
Adrián Larumbe <adrian.larumbe@...labora.com> wrote:
> This is v4 of https://lore.kernel.org/lkml/20240521181817.097af5e1@collabora.com/T/
>
> The goal of this patch series is fixing a deadlock upon locking the dma reservation
> of a DRM gem object when pinning it, at a prime import operation.
>
> Changelog:
> v3:
> - Split driver fixes into separate commits for Panfrost and Lima
> - Make drivers call drm_gem_shmem_pin_locked instead of drm_gem_shmem_object_pin
> - Improved commit message for first patch to explain why dma resv locking in the
> pin callback is no longer necessary.
> v2:
> - Removed comment explaining reason why an already-locked
> pin function replaced the locked variant inside Panfrost's
> object pin callback.
> - Moved already-assigned attachment warning into generic
> already-locked gem object pin function
>
>
> Adrián Larumbe (3):
> drm/panfrost: Fix dma_resv deadlock at drm object pin time
> drm/lima: Fix dma_resv deadlock at drm object pin time
> drm/gem-shmem: Add import attachment warning to locked pin function
Queued to drm-misc-fixes.
Thanks!
Boris
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