linux-kernel - [PATCH v7 3/6] vfio: use vfio_pci_core_setup

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Message-ID: <20251126052627.43335-4-ankita@nvidia.com>
Date: Wed, 26 Nov 2025 05:26:24 +0000
From: <ankita@...dia.com>
To: <ankita@...dia.com>, <jgg@...pe.ca>, <yishaih@...dia.com>,
	<skolothumtho@...dia.com>, <kevin.tian@...el.com>, <alex@...zbot.org>,
	<aniketa@...dia.com>, <vsethi@...dia.com>, <mochs@...dia.com>
CC: <Yunxiang.Li@....com>, <yi.l.liu@...el.com>,
	<zhangdongdong@...incomputing.com>, <avihaih@...dia.com>,
	<bhelgaas@...gle.com>, <peterx@...hat.com>, <pstanner@...hat.com>,
	<apopple@...dia.com>, <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<cjia@...dia.com>, <kwankhede@...dia.com>, <targupta@...dia.com>,
	<zhiw@...dia.com>, <danw@...dia.com>, <dnigam@...dia.com>, <kjaju@...dia.com>
Subject: [PATCH v7 3/6] vfio: use vfio_pci_core_setup_barmap to map bar in mmap

From: Ankit Agrawal <ankita@...dia.com>

Remove code duplication in vfio_pci_core_mmap by calling
vfio_pci_core_setup_barmap to perform the bar mapping.

No functional change is intended.

Cc: Donald Dutile <ddutile@...hat.com>
Reviewed-by: Shameer Kolothum <skolothumtho@...dia.com>
Reviewed-by: Zhi Wang <zhiw@...dia.com>
Suggested-by: Alex Williamson <alex@...zbot.org>
Signed-off-by: Ankit Agrawal <ankita@...dia.com>
---
 drivers/vfio/pci/vfio_pci_core.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
index 52e3a10d776b..020bf3aa22e9 100644
--- a/drivers/vfio/pci/vfio_pci_core.c
+++ b/drivers/vfio/pci/vfio_pci_core.c
@@ -1753,18 +1753,9 @@ int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma
 	 * Even though we don't make use of the barmap for the mmap,
 	 * we need to request the region and the barmap tracks that.
 	 */
-	if (!vdev->barmap[index]) {
-		ret = pci_request_selected_regions(pdev,
-						   1 << index, "vfio-pci");
-		if (ret)
-			return ret;
-
-		vdev->barmap[index] = pci_iomap(pdev, index, 0);
-		if (!vdev->barmap[index]) {
-			pci_release_selected_regions(pdev, 1 << index);
-			return -ENOMEM;
-		}
-	}
+	ret = vfio_pci_core_setup_barmap(vdev, index);
+	if (ret)
+		return ret;
 
 	vma->vm_private_data = vdev;
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-- 
2.34.1