From: sashiko-bot@kernel.org
To: "Matt Evans" <matt@ozlabs.org>
Cc: media-ci@linuxtv.org, dri-devel@lists.freedesktop.org,
kvm@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH v8 2/9] vfio/pci: Un-revoke DMABUFs in LOW_POWER_ENTRY_WITH_WAKEUP resume
Date: Tue, 06 Oct 2026 19:45:32 +0000 [thread overview]
Message-ID: <sashiko-outbox-162409@kernel.org> (raw)
In-Reply-To: <20261006193643.76330-3-matt@ozlabs.org>
> VFIO_DEVICE_FEATURE_LOW_POWER_ENTRY_WITH_WAKEUP correctly revokes
> DMABUFs on entry and, when paired with a
> VFIO_DEVICE_FEATURE_LOW_POWER_EXIT, vfio_pci_runtime_pm_exit()
> correctly un-revokes them.
>
> However, when vfio_pci_core_runtime_resume() signals the eventfd on
> resume, the bare __vfio_pci_runtime_pm_exit() is used (which does not
> un-revoke). Add vfio_pci_dma_buf_move(false) to the resume path,
> making it similar to vfio_pci_runtime_pm_exit().
>
> This also reorders the eventfd signal after the un-revoke and
> __vfio_pci_runtime_pm_exit() to guarantee that woken threads observe
> the new state.
>
> Fixes: 5d74781ebc86 ("vfio/pci: Add dma-buf export support for MMIO regions")
> Signed-off-by: Matt Evans <matt@ozlabs.org>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261006193643.76330-1-matt@ozlabs.org?part=2
next prev parent reply other threads:[~2026-10-06 19:45 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 19:36 [PATCH v8 0/9] vfio/pci: Add mmap() for DMABUFs Matt Evans
2026-10-06 19:36 ` [PATCH v8 1/9] vfio/pci: Remove DMABUF export dependency on vdev->memory_lock Matt Evans
2026-10-06 19:48 ` sashiko-bot
2026-10-06 19:36 ` [PATCH v8 2/9] vfio/pci: Un-revoke DMABUFs in LOW_POWER_ENTRY_WITH_WAKEUP resume Matt Evans
2026-10-06 19:45 ` sashiko-bot [this message]
2026-10-06 19:36 ` [PATCH v8 3/9] dma-buf: Provide dma_buf_set_name() Matt Evans
2026-10-06 19:45 ` sashiko-bot
2026-10-07 9:22 ` Christian König
2026-10-12 6:27 ` Leon Romanovsky
2026-10-06 19:36 ` [PATCH v8 4/9] vfio/pci: Add a helper to look up PFNs for DMABUFs Matt Evans
2026-10-06 19:48 ` sashiko-bot
2026-10-06 19:36 ` [PATCH v8 5/9] vfio/pci: Add a helper to create a DMABUF for a BAR-map VMA Matt Evans
2026-10-06 19:53 ` sashiko-bot
2026-10-06 19:36 ` [PATCH v8 6/9] vfio/pci: Convert BAR mmap() to use a DMABUF Matt Evans
2026-10-06 19:55 ` sashiko-bot
2026-10-06 19:36 ` [PATCH v8 7/9] vfio/pci: Clean up BAR zap and revocation Matt Evans
2026-10-06 19:54 ` sashiko-bot
2026-10-06 19:36 ` [PATCH v8 8/9] vfio/pci: Support mmap() of a VFIO DMABUF Matt Evans
2026-10-06 19:54 ` sashiko-bot
2026-10-06 19:36 ` [PATCH v8 9/9] vfio/pci: Revoke a DMABUF on request from userspace Matt Evans
2026-10-06 19:45 ` sashiko-bot
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