linux-kernel - RE: [PATCH] PCI: cadence: Disable Function Level Reset support

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Date:   Wed, 20 Oct 2021 03:38:47 +0000
From:   Parshuram Raju Thombare <pthombar@...ence.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
CC:     "kishon@...com" <kishon@...com>, Tom Joseph <tjoseph@...ence.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "robh@...nel.org" <robh@...nel.org>, "kw@...ux.com" <kw@...ux.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Milind Parab <mparab@...ence.com>
Subject: RE: [PATCH] PCI: cadence: Disable Function Level Reset support

>Add blank lines between paragraphs.
>Write the text in imperative mood, e.g.,

Ok

>  Disable FLR (Function Level Reset) support on all functions.
>It looks like this patch clears PCI_EXP_DEVCAP_FLR in the Device
>Capabilities register.  From the point of view of Linux, that means
>the device doesn't *advertise* FLR support.
>
>That's different from actualy *disabling* FLR support, but maybe
>there's internal logic in the device that ignores
>PCI_EXP_DEVCTL_BCR_FLR when PCI_EXP_DEVCAP_FLR is cleared?

Yes, this patch is just to prevent device from advertising FLR support.

Regards,
Parshuram Thombare