linux-kernel - Re: [PATCH v4 12/13] nova-core: falcon: Add support to write firmware version

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Message-ID: <aaf218306186aa8959d8f3971a62afb9f229548b.camel@nvidia.com>
Date: Wed, 8 Oct 2025 03:21:10 +0000
From: Timur Tabi <ttabi@...dia.com>
To: "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	Alistair Popple <apopple@...dia.com>, Alexandre Courbot
	<acourbot@...dia.com>, "dakr@...nel.org" <dakr@...nel.org>,
	"rust-for-linux@...r.kernel.org" <rust-for-linux@...r.kernel.org>
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Subject: Re: [PATCH v4 12/13] nova-core: falcon: Add support to write firmware
 version

On Wed, 2025-10-08 at 11:12 +1100, Alistair Popple wrote:
> +
> +    /// Write the application version to the OS register.
> +    #[expect(dead_code)]
> +    pub(crate) fn write_os_version(&self, bar: &Bar0, app_version: u32) -> Result<()> {
> +        regs::NV_PFALCON_FALCON_OS::default()
> +            .set_value(app_version)
> +            .write(bar, &E::ID);
> +        Ok(())
> +    }

I should have noticed this in v3, but why return Result here?  This is just like is_riscv_active
-- this function cannot fail.