linux-kernel - [PATCH v3 05/26] misc: pci_endpoint_test: Use PCI_STD_NUM

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Message-Id: <20190916204158.6889-6-efremov@linux.com>
Date:   Mon, 16 Sep 2019 23:41:37 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Denis Efremov <efremov@...ux.com>, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org, Andrew Murray <andrew.murray@....com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: [PATCH v3 05/26] misc: pci_endpoint_test: Use PCI_STD_NUM_BARS

To iterate through all possible BARs, loop conditions refactored to the
*number* of BARs "i < PCI_STD_NUM_BARS", instead of the index of the last
valid BAR "i <= BAR_5". This is more idiomatic C style and allows to avoid
the fencepost error. Array definitions changed to PCI_STD_NUM_BARS where
appropriate.

Cc: Kishon Vijay Abraham I <kishon@...com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 drivers/misc/pci_endpoint_test.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 6e208a060a58..a5e317073d95 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -94,7 +94,7 @@ enum pci_barno {
 struct pci_endpoint_test {
 	struct pci_dev	*pdev;
 	void __iomem	*base;
-	void __iomem	*bar[6];
+	void __iomem	*bar[PCI_STD_NUM_BARS];
 	struct completion irq_raised;
 	int		last_irq;
 	int		num_irqs;
@@ -687,7 +687,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 	if (!pci_endpoint_test_request_irq(test))
 		goto err_disable_irq;
 
-	for (bar = BAR_0; bar <= BAR_5; bar++) {
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
 		if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
 			base = pci_ioremap_bar(pdev, bar);
 			if (!base) {
@@ -740,7 +740,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 	ida_simple_remove(&pci_endpoint_test_ida, id);
 
 err_iounmap:
-	for (bar = BAR_0; bar <= BAR_5; bar++) {
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
 		if (test->bar[bar])
 			pci_iounmap(pdev, test->bar[bar]);
 	}
@@ -771,7 +771,7 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
 	misc_deregister(&test->miscdev);
 	kfree(misc_device->name);
 	ida_simple_remove(&pci_endpoint_test_ida, id);
-	for (bar = BAR_0; bar <= BAR_5; bar++) {
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
 		if (test->bar[bar])
 			pci_iounmap(pdev, test->bar[bar]);
 	}
-- 
2.21.0