From: sashiko-bot@kernel.org
To: "Pranjal Shrivastava" <praan@google.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH v2 5/5] PCI/ATS: Mandate checking pci_ats_supported() before pci_prepare_ats()
Date: Fri, 14 Aug 2026 03:11:13 +0000 [thread overview]
Message-ID: <20260814031118.221DC1F000E9@smtp.kernel.org> (raw)
In-Reply-To: <20260814015647.3370124-6-praan@google.com>
> Currently, pci_prepare_ats() internally calls pci_ats_supported() and
> returns -EINVAL if the device does not support ATS. While this provides
> a silent safety check, it conflates support detection with configuration.
>
> Update pci_prepare_ats() to wrap the internal pci_ats_supported check in
> a WARN_ON(). This mandates all callers to call pci_prepare_ats() only if
> the function supports ATS.
>
> Update the function documentation to mention that callers must verify
> ATS support (via pci_ats_supported()) before calling pci_prepare_ats().
>
> Suggested-by: Baolu Lu <baolu.lu@linux.intel.com>
> Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
> Signed-off-by: Pranjal Shrivastava <praan@google.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260814015647.3370124-1-praan@google.com?part=5
prev parent reply other threads:[~2026-08-14 3:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-14 1:56 [PATCH v2 0/5] iommu/amd: Refactors for ATS robustness Pranjal Shrivastava
2026-08-14 1:56 ` [PATCH v2 1/5] iommu/amd: Refactor device probe and capability initialization Pranjal Shrivastava
2026-08-14 2:13 ` sashiko-bot
2026-08-14 1:56 ` [PATCH v2 2/5] iommu/amd: Fix DTE clearing and rename iommu_ignore_device() Pranjal Shrivastava
2026-08-14 2:34 ` sashiko-bot
2026-08-14 1:56 ` [PATCH v2 3/5] iommu/amd: Split probe error paths to preserve IRQ remapping Pranjal Shrivastava
2026-08-14 2:54 ` sashiko-bot
2026-08-14 1:56 ` [PATCH v2 4/5] iommu/amd: Fail probe on ATS configuration failure Pranjal Shrivastava
2026-08-14 3:05 ` sashiko-bot
2026-08-14 1:56 ` [PATCH v2 5/5] PCI/ATS: Mandate checking pci_ats_supported() before pci_prepare_ats() Pranjal Shrivastava
2026-08-14 3:11 ` sashiko-bot [this message]
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