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Re: [patch V2 20/23] PCI/MSI: Move msi_lock to struct pci_dev
- To: Jason Gunthorpe <jgg@xxxxxxxxxx>
- From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
- Date: Wed, 08 Dec 2021 21:56:50 +0100
- Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, Bjorn Helgaas <helgaas@xxxxxxxxxx>, Marc Zygnier <maz@xxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Megha Dey <megha.dey@xxxxxxxxx>, Ashok Raj <ashok.raj@xxxxxxxxx>, linux-pci@xxxxxxxxxxxxxxx, Cedric Le Goater <clg@xxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, Juergen Gross <jgross@xxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, linux-mips@xxxxxxxxxxxxxxx, Kalle Valo <kvalo@xxxxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, sparclinux@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, ath11k@xxxxxxxxxxxxxxxxxxx, Wei Liu <wei.liu@xxxxxxxxxx>, linux-hyperv@xxxxxxxxxxxxxxx, Christian Borntraeger <borntraeger@xxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>
- Delivery-date: Wed, 08 Dec 2021 20:57:06 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Dec 08 2021 at 11:29, Jason Gunthorpe wrote:
> On Mon, Dec 06, 2021 at 11:27:56PM +0100, Thomas Gleixner wrote:
>> if (!desc->pci.msi_attrib.can_mask)
>
> It looks like most of the time this is called by an irq_chip, except
> for a few special cases list pci_msi_shutdown()
>
> Is this something that should ideally go away someday and use some
> lock in the irq_chip - not unlike what we've thought is needed for
> IMS?
Some day we'll have that yes.
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