@@ -170,8 +170,12 @@ SYSCALL_DEFINE3(s390_pci_mmio_write, unsigned long, mmio_addr,
goto out_unlock_mmap;
ret = follow_pte(vma, mmio_addr, &ptep, &ptl);
- if (ret)
- goto out_unlock_mmap;
+ if (ret) {
+ fixup_user_fault(current->mm, mmio_addr, FAULT_FLAG_WRITE, NULL);
+ ret = follow_pte(vma, mmio_addr, &ptep, &ptl);
+ if (ret)
+ goto out_unlock_mmap;
+ }
io_addr = (void __iomem *)((pte_pfn(*ptep) << PAGE_SHIFT) |
(mmio_addr & ~PAGE_MASK));
@@ -305,12 +309,16 @@ SYSCALL_DEFINE3(s390_pci_mmio_read, unsigned long, mmio_addr,
if (!(vma->vm_flags & (VM_IO | VM_PFNMAP)))
goto out_unlock_mmap;
ret = -EACCES;
- if (!(vma->vm_flags & VM_WRITE))
+ if (!(vma->vm_flags & VM_READ))
goto out_unlock_mmap;
ret = follow_pte(vma, mmio_addr, &ptep, &ptl);
- if (ret)
- goto out_unlock_mmap;
+ if (ret) {
+ fixup_user_fault(current->mm, mmio_addr, 0, NULL);
+ ret = follow_pte(vma, mmio_addr, &ptep, &ptl);
+ if (ret)
+ goto out_unlock_mmap;
+ }
io_addr = (void __iomem *)((pte_pfn(*ptep) << PAGE_SHIFT) |
(mmio_addr & ~PAGE_MASK));