Re: [PATCH v3 3/5] rust: pci: make Vendor::from_raw() public

Alice Ryhl <[email protected]>
Newsgroups dev.linux.lists.nova-gpu,org.freedesktop.lists.dri-devel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci,org.kernel.vger.rust-for-linux
Message-ID <[email protected]>
On Wed, Aug 12, 2026 at 09:52:37PM +0200, Maurice Hieronymus wrote:
> `Vendor::from_raw()` is currently `pub(super)`, so a Vendor can only be
> obtained through the named constants generated from the
> `PCI_VENDOR_ID_*` defines in `<linux/pci_ids.h>`. A driver therefore
> cannot match a device whose vendor ID has no symbolic name.
> 
> Such devices exist. QEMU's "edu" educational device and the legacy
> qemu/Bochs stdvga both use vendor ID 0x1234, which is not registered in
> `pci_ids.h`. Per the policy stated at the top of that header, IDs are
> only added there when shared between multiple drivers; a single-driver
> ID is expected to be open-coded in the driver instead. C drivers already
> do this -- see `drivers/gpu/drm/tiny/bochs.c`, which matches with a bare
> ".vendor = 0x1234".

IMO we should just add Qemu to the list. No reason to hard-code it per
driver for this case.

Alice
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