linux-kernel - [PATCH v2 2/2] vfio: Use device_iommu

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Message-Id: <910aef11138e3b6702b29a3e78415235aa4bf773.1655898523.git.robin.murphy@arm.com>
Date:   Wed, 22 Jun 2022 13:04:12 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     alex.williamson@...hat.com, cohuck@...hat.com
Cc:     kvm@...r.kernel.org, iommu@...ts.linux.dev,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        jgg@...dia.com
Subject: [PATCH v2 2/2] vfio: Use device_iommu_capable()

Use the new interface to check the capabilities for our device
specifically.

Signed-off-by: Robin Murphy <robin.murphy@....com>
---
 drivers/vfio/vfio.c             | 2 +-
 drivers/vfio/vfio_iommu_type1.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 73bab04880d0..765d68192c88 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -621,7 +621,7 @@ int vfio_register_group_dev(struct vfio_device *device)
 	 * VFIO always sets IOMMU_CACHE because we offer no way for userspace to
 	 * restore cache coherency.
 	 */
-	if (!iommu_capable(device->dev->bus, IOMMU_CAP_CACHE_COHERENCY))
+	if (!device_iommu_capable(device->dev, IOMMU_CAP_CACHE_COHERENCY))
 		return -EINVAL;
 
 	return __vfio_register_dev(device,
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index e38b8bfde677..2107e95eb743 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -2247,7 +2247,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
 	list_add(&group->next, &domain->group_list);
 
 	msi_remap = irq_domain_check_msi_remap() ||
-		    iommu_capable(iommu_api_dev->dev->bus, IOMMU_CAP_INTR_REMAP);
+		    device_iommu_capable(iommu_api_dev->dev, IOMMU_CAP_INTR_REMAP);
 
 	if (!allow_unsafe_interrupts && !msi_remap) {
 		pr_warn("%s: No interrupt remapping support.  Use the module param \"allow_unsafe_interrupts\" to enable VFIO IOMMU support on this platform\n",
-- 
2.36.1.dirty