[PATCH v1 02/25] PCI: designware: Free bridge resource list on failure

Bjorn Helgaas
2016-06-06T23:05:01Z

of_pci_get_host_bridge_resources() allocates a list of resources for host
bridge windows. If we fail after allocating that list, free it before we
return error.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/host/pcie-designware.c | 24 +++++++++++++++++-------
1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index aafd766..9ade767 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -493,7 +493,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
resource_size(pp->cfg));
if (!pp->dbi_base) {
dev_err(pp->dev, "error with ioremap\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto error;
}
}

@@ -504,7 +505,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->cfg0_size);
if (!pp->va_cfg0_base) {
dev_err(pp->dev, "error with ioremap in function\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto error;
}
}

@@ -513,7 +515,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->cfg1_size);
if (!pp->va_cfg1_base) {
dev_err(pp->dev, "error with ioremap\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto error;
}
}

@@ -528,7 +531,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
&dw_pcie_msi_chip);
if (!pp->irq_domain) {
dev_err(pp->dev, "irq domain init failed\n");
- return -ENXIO;
+ ret = -ENXIO;
+ goto error;
}

for (i = 0; i < MAX_MSI_IRQS; i++)
@@ -536,7 +540,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
} else {
ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
if (ret < 0)
- return ret;
+ goto error;
}
}

@@ -552,8 +556,10 @@ int dw_pcie_host_init(struct pcie_port *pp)
} else
bus = pci_scan_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
pp, &res);
- if (!bus)
- return -ENOMEM;
+ if (!bus) {
+ ret = -ENOMEM;
+ goto error;
+ }

if (pp->ops->scan_bus)
pp->ops->scan_bus(pp);
@@ -571,6 +577,10 @@ int dw_pcie_host_init(struct pcie_port *pp)

pci_bus_add_devices(bus);
return 0;
+
+error:
+ pci_free_resource_list(&res);
+ return ret;
}

static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,