linux-kernel - Re: (subset) [PATCH drm-misc-next 3/5] drm/imagination: vm: fix drm

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Message-Id: <170117646120.2825698.16047207632231408028.b4-ty@kernel.org>
Date:   Tue, 28 Nov 2023 14:01:01 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     airlied@...il.com, daniel@...ll.ch, frank.binns@...tec.com,
        donald.robson@...tec.com, matt.coster@...tec.com,
        sarah.walker@...tec.com, Danilo Krummrich <dakr@...hat.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: (subset) [PATCH drm-misc-next 3/5] drm/imagination: vm: fix
 drm_gpuvm reference count

On Sat, 25 Nov 2023 00:36:38 +0100, Danilo Krummrich wrote:
> The driver specific reference count indicates whether the VM should be
> teared down, whereas GPUVM's reference count indicates whether the VM
> structure can finally be freed.
> 
> Hence, free the VM structure in pvr_gpuvm_free() and drop the last
> GPUVM reference after tearing down the VM. Generally, this prevents
> lifetime issues such as the VM being freed as long as drm_gpuvm_bo
> structures still hold references to the VM.
> 
> [...]

Applied to drm/drm-misc (drm-misc-next).

Thanks!
Maxime