From: "Alexandre Courbot" <acourbot@nvidia.com>
To: "Zhi Wang" <zhiw@nvidia.com>
Cc: <dakr@kernel.org>, <airlied@gmail.com>, <simona@ffwll.ch>,
<ojeda@kernel.org>, <alex.gaynor@gmail.com>,
<boqun.feng@gmail.com>, <gary@garyguo.net>,
<bjorn3_gh@protonmail.com>, <lossin@kernel.org>,
<a.hindborg@kernel.org>, <aliceryhl@google.com>,
<tmgross@umich.edu>, <jhubbard@nvidia.com>,
<ecourtney@nvidia.com>, <joelagnelf@nvidia.com>,
<apopple@nvidia.com>, <cjia@nvidia.com>, <smitra@nvidia.com>,
<kjaju@nvidia.com>, <alkumar@nvidia.com>, <ankita@nvidia.com>,
<aniketa@nvidia.com>, <kwankhede@nvidia.com>,
<targupta@nvidia.com>, <nova-gpu@lists.linux.dev>,
<linux-kernel@vger.kernel.org>, <zhiwang@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"David Laight" <david.laight.linux@gmail.com>,
<linux-pci@vger.kernel.org>
Subject: Re: [PATCH v3 1/8] PCI/IOV: Return unsigned int from pci_sriov_get_totalvfs()
Date: Wed, 08 Jul 2026 22:54:12 +0900 [thread overview]
Message-ID: <DJT8O1RG43FI.1G66ZTP2DRPII@nvidia.com> (raw)
In-Reply-To: <20260701062622.3499033-2-zhiw@nvidia.com>
On Wed Jul 1, 2026 at 3:26 PM JST, Zhi Wang wrote:
> pci_sriov_get_totalvfs() reports a VF count, not an errno-style
> status. It returns 0 when SR-IOV is unavailable or the device is not a
> PF, and otherwise returns the PF's driver_max_VFs value.
>
> driver_max_VFs is stored as a u16 in struct pci_sriov. It is derived
> from the SR-IOV TotalVFs field or from a driver-provided limit, so the
> implementation cannot return a negative value.
>
> Change the declaration, CONFIG_PCI_IOV stub, and implementation to
> return unsigned int.
>
> Suggested-by: Alexandre Courbot <acourbot@nvidia.com>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: David Laight <david.laight.linux@gmail.com>
> Cc: Gary Guo <gary@garyguo.net>
> Cc: linux-pci@vger.kernel.org
> Link: https://lore.kernel.org/all/DJHPRE4TGGT8.BUTMYOF5YE05@nvidia.com/
> Signed-off-by: Zhi Wang <zhiw@nvidia.com>
FWIW,
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
next prev parent reply other threads:[~2026-07-08 13:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 6:26 [PATCH v3 0/8] gpu: nova-core: boot GSP with vGPU enabled Zhi Wang
2026-07-01 6:26 ` [PATCH v3 1/8] PCI/IOV: Return unsigned int from pci_sriov_get_totalvfs() Zhi Wang
2026-07-08 13:54 ` Alexandre Courbot [this message]
2026-07-01 6:26 ` [PATCH v3 2/8] rust: pci: add sriov_get_totalvfs() helper Zhi Wang
2026-07-08 14:03 ` Alexandre Courbot
2026-07-08 14:13 ` Alexandre Courbot
2026-07-09 14:24 ` Zhi Wang
2026-07-08 14:41 ` Alexandre Courbot
2026-07-09 14:25 ` Zhi Wang
2026-07-01 6:26 ` [PATCH v3 3/8] gpu: nova-core: fsp: rename FSP response header type Zhi Wang
2026-07-08 13:37 ` Alexandre Courbot
2026-07-01 6:26 ` [PATCH v3 4/8] gpu: nova-core: read vGPU mode from FSP via PRC protocol Zhi Wang
2026-07-01 6:26 ` [PATCH v3 5/8] gpu: nova-core: add vGPU preludes Zhi Wang
2026-07-09 5:25 ` Alexandre Courbot
2026-07-09 14:39 ` Zhi Wang
2026-07-01 6:26 ` [PATCH v3 6/8] gpu: nova-core: build SetRegistry entries dynamically Zhi Wang
2026-07-08 13:37 ` Alexandre Courbot
2026-07-01 6:26 ` [PATCH v3 7/8] gpu: nova-core: set RMSetSriovMode for vGPU Zhi Wang
2026-07-01 6:26 ` [PATCH v3 8/8] gpu: nova-core: reserve vGPU WPR2 heap Zhi Wang
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