[PATCH v4 2/4] PCI: pci-host-generic: Fix lookup of linux,pci-probe-only property
From: Marc Zyngier <hidden>
Date: 2015-09-04 16:50:30
Also in:
linux-arm-kernel, linux-pci, linuxppc-dev, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
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 <redacted> --- 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..224303d 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_id = of_match_node(gen_pci_of_match, np); pci->cfg.ops = of_id->data;
--
2.1.4