linux-kernel - Re: [PATCH] fpga: altera_cvp: restrict registration to CvP enabled devices

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Message-ID: <20181022140409.GA1883@archbook>
Date:   Mon, 22 Oct 2018 15:04:09 +0100
From:   Moritz Fischer <mdf@...nel.org>
To:     Andreas Puhm <puhm@...gano.at>
Cc:     Moritz Fischer <mdf@...nel.org>, Alan Tull <atull@...nel.org>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fpga: altera_cvp: restrict registration to CvP enabled
 devices

Hi Andreas,

On Mon, Oct 22, 2018 at 01:15:34PM +0000, Andreas Puhm wrote:

Can you please send your patch using git-send-email?

[..]

> Subject: [PATCH] fpga: altera_cvp: restrict registration to CvP enabled devices

How about:

fpga: altera-cvp: Fix registration for CvP incapable devices

The probe function needs to verify the CvP enable bit in order to
properly determine if FPGA Manager functionality can be safely
enabled.

> 
> The altera-cvp probe function now verifies, that the PCI device supports
> the CvP feature, before it registers the device.
> This is done by reading the CVP_EN bit,
> Bit 20 of the CVP_STATUS register (@ PCI Config Address 0x21C).
> 
> If this bit is '1' (CvP enabled), altera-cvp will register the device
> for further interaction.
> If this bit is '0' (CvP disabled), altera-cvp will not register the device.
> 

Could you add a Fixes <hash> ("Message") tag here, I believe we had this
issue since the very beginning, i.e

Fixes 34d1dc17ce97 ("fpga manager: Add Altera CvP driver")

Something like ^^^^

Thanks,

Moritz