Re: [PATCH 1/2] drivers/dax: Avoiding potential deadlock

[Dan Williams]

On Mon, Apr 10, 2017 at 10:26 PM, Pushkar Jambhlekar
<pushkar.iit@xxxxxxxxx> wrote:
> dax_dev_huge_fault returning without releasing lock. Making code change to avoid this situation
>
> Signed-off-by: Pushkar Jambhlekar <pushkar.iit@xxxxxxxxx>
> ---
>  drivers/dax/dax.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
> index 0d1ca24..fd9c4db 100644
> --- a/drivers/dax/dax.c
> +++ b/drivers/dax/dax.c
> @@ -590,7 +590,7 @@ static int dax_dev_huge_fault(struct vm_fault *vmf,
>                 rc = __dax_dev_pud_fault(dax_dev, vmf);
>                 break;
>         default:
> -               return VM_FAULT_FALLBACK;
> +               rc = VM_FAULT_FALLBACK;
>         }
>         rcu_read_unlock();

Thanks Pushkar, I'll apply this and combine with patch 2 as well.