linux-kernel - [PATCH 2/9] PCI: mvebu: increment nports only for registered ports

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Date:	Mon, 12 Aug 2013 20:46:48 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Russell King <linux@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-pci@...r.kernel.org
Subject: [PATCH 2/9] PCI: mvebu: increment nports only for registered ports

The number of ports is probed by counting the number of available child nodes.
Later on, the registration of a port can fail and cause a mismatch between
the ->nports counter and registered ports. This patch modifies the counting
strategy, to make ->nports represent the number of registered ports instead
of the number of available childs.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
---
Cc: Russell King <linux@....linux.org.uk>
Cc: Jason Cooper <jason@...edaemon.net>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-pci@...r.kernel.org
---
 drivers/pci/host/pci-mvebu.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index d5fe674..0a359d7 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -842,21 +842,21 @@ static int __init mvebu_pcie_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	i = 0;
 	for_each_child_of_node(pdev->dev.of_node, child) {
 		if (!of_device_is_available(child))
 			continue;
-		pcie->nports++;
+		i++;
 	}
 
-	pcie->ports = devm_kzalloc(&pdev->dev, pcie->nports *
+	pcie->ports = devm_kzalloc(&pdev->dev, i *
 				   sizeof(struct mvebu_pcie_port),
 				   GFP_KERNEL);
 	if (!pcie->ports)
 		return -ENOMEM;
 
-	i = 0;
 	for_each_child_of_node(pdev->dev.of_node, child) {
-		struct mvebu_pcie_port *port = &pcie->ports[i];
+		struct mvebu_pcie_port *port = &pcie->ports[pcie->nports];
 
 		if (!of_device_is_available(child))
 			continue;
@@ -929,7 +929,7 @@ static int __init mvebu_pcie_probe(struct platform_device *pdev)
 		port->dn = child;
 		spin_lock_init(&port->conf_lock);
 		mvebu_sw_pci_bridge_init(port);
-		i++;
+		pcie->nports++;
 	}
 
 	mvebu_pcie_msi_enable(pcie);
-- 
1.7.10.4

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