On some platforms such as that based on x86, ia64 etc, root bus is created with parent node passed in as NULL to pci_create_root_bus(). On these platforms, the patch series "PCI: get DMA configuration from parent device" when applied causes kernel crash. So add a check for this in of_pci_dma_configure() Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx> --- drivers/of/of_pci.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 86d3c38..a8e485c 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -129,6 +129,10 @@ void of_pci_dma_configure(struct pci_dev *pci_dev) struct device *dev = &pci_dev->dev; struct device *bridge = pci_get_host_bridge_device(pci_dev); + /* Some platforms can have bridge->parent set to NULL */ + if (!bridge->parent) + return; + of_dma_configure(dev, bridge->parent->of_node); pci_put_host_bridge_device(bridge); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
