linux-kernel - [PATCH v3 13/26] e1000: Use PCI_STD_NUM

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Message-Id: <20190916204158.6889-14-efremov@linux.com>
Date:   Mon, 16 Sep 2019 23:41:45 +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>,
        netdev@...r.kernel.org, Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH v3 13/26] e1000: 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.

Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc: "David S. Miller" <davem@...emloft.net>
Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 drivers/net/ethernet/intel/e1000/e1000.h      | 1 -
 drivers/net/ethernet/intel/e1000/e1000_main.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000/e1000.h b/drivers/net/ethernet/intel/e1000/e1000.h
index c40729b2c184..7fad2f24dcad 100644
--- a/drivers/net/ethernet/intel/e1000/e1000.h
+++ b/drivers/net/ethernet/intel/e1000/e1000.h
@@ -45,7 +45,6 @@
 
 #define BAR_0		0
 #define BAR_1		1
-#define BAR_5		5
 
 #define INTEL_E1000_ETHERNET_DEVICE(device_id) {\
 	PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index f703fa58458e..db4fd82036af 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -977,7 +977,7 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_ioremap;
 
 	if (adapter->need_ioport) {
-		for (i = BAR_1; i <= BAR_5; i++) {
+		for (i = BAR_1; i < PCI_STD_NUM_BARS; i++) {
 			if (pci_resource_len(pdev, i) == 0)
 				continue;
 			if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
-- 
2.21.0