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-rw-r--r--drivers/pci/pci-sysfs.c13
-rw-r--r--drivers/pci/proc.c11
2 files changed, 15 insertions, 9 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 7d494bd66a97..cb04bc29943f 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1174,11 +1174,14 @@ static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
} else {
pdev->res_attr[num] = res_attr;
sprintf(res_attr_name, "resource%d", num);
- res_attr->mmap = pci_mmap_resource_uc;
- }
- if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
- res_attr->read = pci_read_resource_io;
- res_attr->write = pci_write_resource_io;
+ if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
+ res_attr->read = pci_read_resource_io;
+ res_attr->write = pci_write_resource_io;
+ if (arch_can_pci_mmap_io())
+ res_attr->mmap = pci_mmap_resource_uc;
+ } else {
+ res_attr->mmap = pci_mmap_resource_uc;
+ }
}
res_attr->attr.name = res_attr_name;
res_attr->attr.mode = S_IRUSR | S_IWUSR;
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index a2aa58a8fb96..45e5cf7e9193 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -202,6 +202,8 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
#ifdef HAVE_PCI_MMAP
case PCIIOC_MMAP_IS_IO:
+ if (!arch_can_pci_mmap_io())
+ return -EINVAL;
fpriv->mmap_state = pci_mmap_io;
break;
@@ -232,15 +234,16 @@ static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
{
struct pci_dev *dev = PDE_DATA(file_inode(file));
struct pci_filp_private *fpriv = file->private_data;
- int i, ret, write_combine = 0, res_bit;
+ int i, ret, write_combine = 0, res_bit = IORESOURCE_MEM;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
- if (fpriv->mmap_state == pci_mmap_io)
+ if (fpriv->mmap_state == pci_mmap_io) {
+ if (!arch_can_pci_mmap_io())
+ return -EINVAL;
res_bit = IORESOURCE_IO;
- else
- res_bit = IORESOURCE_MEM;
+ }
/* Make sure the caller is mapping a real resource for this device */
for (i = 0; i < PCI_ROM_RESOURCE; i++) {