lkml.org 
[lkml]   [2020]   [May]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] iommu/virtio: reverse arguments to list_add
On Tue, May 05, 2020 at 08:47:47PM +0200, Julia Lawall wrote:
> Elsewhere in the file, there is a list_for_each_entry with
> &vdev->resv_regions as the second argument, suggesting that
> &vdev->resv_regions is the list head. So exchange the
> arguments on the list_add call to put the list head in the
> second argument.
>
> Fixes: 2a5a31487445 ("iommu/virtio: Add probe request")
> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

Thanks for the fix. The reason this hasn't blown up so far is
iommu_alloc_resv_region() initializes region->list, but adding more than
one item would break the list.

Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>

> ---
> drivers/iommu/virtio-iommu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
> index d5cac4f46ca5..4e1d11af23c8 100644
> --- a/drivers/iommu/virtio-iommu.c
> +++ b/drivers/iommu/virtio-iommu.c
> @@ -453,7 +453,7 @@ static int viommu_add_resv_mem(struct viommu_endpoint *vdev,
> if (!region)
> return -ENOMEM;
>
> - list_add(&vdev->resv_regions, &region->list);
> + list_add(&region->list, &vdev->resv_regions);
> return 0;
> }
>
>

\
 
 \ /
  Last update: 2020-05-06 11:36    [W:0.061 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site