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path: root/drivers/vfio
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-rw-r--r--drivers/vfio/pci/vfio_pci.c38
1 files changed, 18 insertions, 20 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 1ab1f5cda4ac..b0f4b92a87ed 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -1480,31 +1480,29 @@ static int vfio_pci_zap_and_vma_lock(struct vfio_pci_device *vdev, bool try)
} else {
mmap_read_lock(mm);
}
- if (mmget_still_valid(mm)) {
- if (try) {
- if (!mutex_trylock(&vdev->vma_lock)) {
- mmap_read_unlock(mm);
- mmput(mm);
- return 0;
- }
- } else {
- mutex_lock(&vdev->vma_lock);
+ if (try) {
+ if (!mutex_trylock(&vdev->vma_lock)) {
+ mmap_read_unlock(mm);
+ mmput(mm);
+ return 0;
}
- list_for_each_entry_safe(mmap_vma, tmp,
- &vdev->vma_list, vma_next) {
- struct vm_area_struct *vma = mmap_vma->vma;
+ } else {
+ mutex_lock(&vdev->vma_lock);
+ }
+ list_for_each_entry_safe(mmap_vma, tmp,
+ &vdev->vma_list, vma_next) {
+ struct vm_area_struct *vma = mmap_vma->vma;
- if (vma->vm_mm != mm)
- continue;
+ if (vma->vm_mm != mm)
+ continue;
- list_del(&mmap_vma->vma_next);
- kfree(mmap_vma);
+ list_del(&mmap_vma->vma_next);
+ kfree(mmap_vma);
- zap_vma_ptes(vma, vma->vm_start,
- vma->vm_end - vma->vm_start);
- }
- mutex_unlock(&vdev->vma_lock);
+ zap_vma_ptes(vma, vma->vm_start,
+ vma->vm_end - vma->vm_start);
}
+ mutex_unlock(&vdev->vma_lock);
mmap_read_unlock(mm);
mmput(mm);
}