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

Sebastian Hesselbarth
2013-08-12T18:47:10Z

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@gmail.com>
---
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-pci@vger.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