linux-kernel - [patch V3 02/35] x86/pci/XEN: Use PCI device property

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Message-ID: <20211210221813.311410967@linutronix.de>
Date:   Fri, 10 Dec 2021 23:18:46 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     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>,
        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,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        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: [patch V3 02/35] x86/pci/XEN: Use PCI device property

From: Thomas Gleixner <tglx@...utronix.de>

instead of fiddling with MSI descriptors.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Juergen Gross <jgross@...e.com>
Cc: xen-devel@...ts.xenproject.org
---
V3: Use pci_dev->msix_enabled.
---
 arch/x86/pci/xen.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -399,9 +399,7 @@ static void xen_teardown_msi_irqs(struct
 
 static void xen_pv_teardown_msi_irqs(struct pci_dev *dev)
 {
-	struct msi_desc *msidesc = first_pci_msi_entry(dev);
-
-	if (msidesc->pci.msi_attrib.is_msix)
+	if (dev->msix_enabled)
 		xen_pci_frontend_disable_msix(dev);
 	else
 		xen_pci_frontend_disable_msi(dev);
@@ -417,10 +415,7 @@ static int xen_msi_domain_alloc_irqs(str
 	if (WARN_ON_ONCE(!dev_is_pci(dev)))
 		return -EINVAL;
 
-	if (first_msi_entry(dev)->pci.msi_attrib.is_msix)
-		type = PCI_CAP_ID_MSIX;
-	else
-		type = PCI_CAP_ID_MSI;
+	type = to_pci_dev(dev)->msix_enabled ? PCI_CAP_ID_MSIX : PCI_CAP_ID_MSI;
 
 	return xen_msi_ops.setup_msi_irqs(to_pci_dev(dev), nvec, type);
 }