linux-kernel - Re: [patch V4 09-02/35] PCI/MSI: Allocate MSI device data on first use

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Message-ID: <YboqBZuwu5qDwxKS@kroah.com>
Date:   Wed, 15 Dec 2021 18:46:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Marc Zygnier <maz@...nel.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Megha Dey <megha.dey@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, linux-pci@...r.kernel.org,
        Cedric Le Goater <clg@...d.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Juergen Gross <jgross@...e.com>,
        xen-devel@...ts.xenproject.org, Arnd Bergmann <arnd@...db.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org, Stuart Yoder <stuyoder@...il.com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org,
        Jassi Brar <jassisinghbrar@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Sinan Kaya <okaya@...nel.org>
Subject: Re: [patch V4 09-02/35] PCI/MSI: Allocate MSI device data on first
 use

On Wed, Dec 15, 2021 at 06:19:49PM +0100, Thomas Gleixner wrote:
> Allocate MSI device data on first use, i.e. when a PCI driver invokes one
> of the PCI/MSI enablement functions.
> 
> Add a wrapper function to ensure that the ordering vs. pcim_msi_release()
> is correct.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>