linux-kernel - [PATCH 7/7] vfio_pci: Use PCI_STD_NUM_BARS in loops instead of PCI_STD_RESOURCE

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Date:   Sun, 11 Aug 2019 18:08:04 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Denis Efremov <efremov@...ux.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        kvm@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 7/7] vfio_pci: Use PCI_STD_NUM_BARS in loops instead of PCI_STD_RESOURCE_END

This patch refactors the loop condition scheme from
'i <= PCI_STD_RESOURCE_END' to 'i < PCI_STD_NUM_BARS'.

Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 drivers/vfio/pci/vfio_pci.c         | 4 ++--
 drivers/vfio/pci/vfio_pci_config.c  | 2 +-
 drivers/vfio/pci/vfio_pci_private.h | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 703948c9fbe1..13f5430e3f3c 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -115,7 +115,7 @@ static void vfio_pci_probe_mmaps(struct vfio_pci_device *vdev)
 
 	INIT_LIST_HEAD(&vdev->dummy_resources_list);
 
-	for (bar = PCI_STD_RESOURCES; bar <= PCI_STD_RESOURCE_END; bar++) {
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
 		res = vdev->pdev->resource + bar;
 
 		if (!IS_ENABLED(CONFIG_VFIO_PCI_MMAP))
@@ -399,7 +399,7 @@ static void vfio_pci_disable(struct vfio_pci_device *vdev)
 
 	vfio_config_free(vdev);
 
-	for (bar = PCI_STD_RESOURCES; bar <= PCI_STD_RESOURCE_END; bar++) {
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
 		if (!vdev->barmap[bar])
 			continue;
 		pci_iounmap(pdev, vdev->barmap[bar]);
diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index f0891bd8444c..6035a2961160 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -455,7 +455,7 @@ static void vfio_bar_fixup(struct vfio_pci_device *vdev)
 
 	bar = (__le32 *)&vdev->vconfig[PCI_BASE_ADDRESS_0];
 
-	for (i = PCI_STD_RESOURCES; i <= PCI_STD_RESOURCE_END; i++, bar++) {
+	for (i = 0; i < PCI_STD_NUM_BARS; i++, bar++) {
 		if (!pci_resource_start(pdev, i)) {
 			*bar = 0; /* Unmapped by host = unimplemented to user */
 			continue;
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index ee6ee91718a4..8a2c7607d513 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -86,8 +86,8 @@ struct vfio_pci_reflck {
 
 struct vfio_pci_device {
 	struct pci_dev		*pdev;
-	void __iomem		*barmap[PCI_STD_RESOURCE_END + 1];
-	bool			bar_mmap_supported[PCI_STD_RESOURCE_END + 1];
+	void __iomem		*barmap[PCI_STD_NUM_BARS];
+	bool			bar_mmap_supported[PCI_STD_NUM_BARS];
 	u8			*pci_config_map;
 	u8			*vconfig;
 	struct perm_bits	*msi_perm;
-- 
2.21.0