powerpc: Fix sysfs pci mmap on 32-bit machines with 64-bit PCI

[safe/jmp/linux-2.6] / arch / powerpc / kernel / of_platform.c

diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c
index fb698d4..3f37a6e 100644 (file)
--- a/arch/powerpc/kernel/of_platform.c
+++ b/arch/powerpc/kernel/of_platform.c
@@ -76,6 +76,8 @@ struct of_device* of_platform_device_create(struct device_node *np,
                return NULL;
 
        dev->dma_mask = 0xffffffffUL;
+       dev->dev.coherent_dma_mask = DMA_32BIT_MASK;
+
        dev->dev.bus = &of_platform_bus_type;
 
        /* We do not fill the DMA ops for platform devices by default.
@@ -275,6 +277,8 @@ static int __devinit of_pci_phb_probe(struct of_device *dev,
 
        /* Scan the bus */
        scan_phb(phb);
+       if (phb->bus == NULL)
+               return -ENXIO;
 
        /* Claim resources. This might need some rework as well depending
         * wether we are doing probe-only or not, like assigning unassigned