When pci-host-generic looks for the probe-only property, it seems
to trust the DT to be correctly written, and assumes that there
is a parameter to the property.

Unfortunately, this is not always the case, and some firmware expose
this property naked. The driver ends up making a decision based on
whatever the property pointer points to, which is likely to be junk.

Switch to the common of_pci.c implementation that doesn't suffer
from this problem.

Signed-off-by: Marc Zyngier <marc.zyng...@arm.com>
---
 drivers/pci/host/pci-host-generic.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/pci/host/pci-host-generic.c 
b/drivers/pci/host/pci-host-generic.c
index 265dd25..545ff4e 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -210,7 +210,6 @@ static int gen_pci_probe(struct platform_device *pdev)
        int err;
        const char *type;
        const struct of_device_id *of_id;
-       const int *prop;
        struct device *dev = &pdev->dev;
        struct device_node *np = dev->of_node;
        struct gen_pci *pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
@@ -225,13 +224,7 @@ static int gen_pci_probe(struct platform_device *pdev)
                return -EINVAL;
        }
 
-       prop = of_get_property(of_chosen, "linux,pci-probe-only", NULL);
-       if (prop) {
-               if (*prop)
-                       pci_add_flags(PCI_PROBE_ONLY);
-               else
-                       pci_clear_flags(PCI_PROBE_ONLY);
-       }
+       of_pci_check_probe_only(of_chosen);
 
        of_id = of_match_node(gen_pci_of_match, np);
        pci->cfg.ops = of_id->data;
-- 
2.1.4

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