diff options
| author | Jason Wang <jasowang@redhat.com> | 2024-07-01 06:31:59 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-26 10:26:02 +0300 |
| commit | 0823dc64586ba5ea13a7d200a5d33e4c5fa45950 (patch) | |
| tree | fa58ab1e15843b6078657aca1d27ec0830835a89 /drivers/vhost | |
| parent | 6d834691da474ed1c648753d3d3a3ef8379fa1c1 (diff) | |
| download | linux-0823dc64586ba5ea13a7d200a5d33e4c5fa45950.tar.xz | |
vhost-vdpa: switch to use vmf_insert_pfn() in the fault handler
remap_pfn_page() should not be called in the fault handler as it may
change the vma->flags which may trigger lockdep warning since the vma
write lock is not held. Actually there's no need to modify the
vma->flags as it has been set in the mmap(). So this patch switches to
use vmf_insert_pfn() instead.
Reported-by: Dragos Tatulea <dtatulea@nvidia.com>
Tested-by: Dragos Tatulea <dtatulea@nvidia.com>
Fixes: ddd89d0a059d ("vhost_vdpa: support doorbell mapping via mmap")
Cc: stable@vger.kernel.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20240701033159.18133-1-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vdpa.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 63a53680a85c..6b9c12acf438 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -1483,13 +1483,7 @@ static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) notify = ops->get_vq_notification(vdpa, index); - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - if (remap_pfn_range(vma, vmf->address & PAGE_MASK, - PFN_DOWN(notify.addr), PAGE_SIZE, - vma->vm_page_prot)) - return VM_FAULT_SIGBUS; - - return VM_FAULT_NOPAGE; + return vmf_insert_pfn(vma, vmf->address & PAGE_MASK, PFN_DOWN(notify.addr)); } static const struct vm_operations_struct vhost_vdpa_vm_ops = { |