iommu/arm: add missing return

[Xen-devel] [PATCH] iommu/arm: add missing return

Posted by Andrii Anisov 6 years, 8 months ago

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>

In case iommu_ops have been already set, we should not update it.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Signed-off-by: Andrii Anisov <andrii_anisov@epam.com>
---

This patch is extracted from [1], as agreed here [2].

[1] https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg01658.html
[2] https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg01859.html

---
 xen/drivers/passthrough/arm/iommu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/drivers/passthrough/arm/iommu.c b/xen/drivers/passthrough/arm/iommu.c
index 325997b..2135233 100644
--- a/xen/drivers/passthrough/arm/iommu.c
+++ b/xen/drivers/passthrough/arm/iommu.c
@@ -32,7 +32,10 @@ void __init iommu_set_ops(const struct iommu_ops *ops)
     BUG_ON(ops == NULL);
 
     if ( iommu_ops && iommu_ops != ops )
+    {
         printk("WARNING: Cannot set IOMMU ops, already set to a different value\n");
+        return;
+    }
 
     iommu_ops = ops;
 }
-- 
2.7.4


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Re: [Xen-devel] [PATCH] iommu/arm: add missing return

Posted by Julien Grall 6 years, 8 months ago

Hi Andrii,

Sorry for the late answer.

On 5/30/19 1:02 PM, Andrii Anisov wrote:
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
> 
> In case iommu_ops have been already set, we should not update it.
> 
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
> Signed-off-by: Andrii Anisov <andrii_anisov@epam.com>

Acked-by: Julien Grall <julien.grall@arm.com>

Cheers,

> ---
> 
> This patch is extracted from [1], as agreed here [2].
> 
> [1] https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg01658.html
> [2] https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg01859.html
> 
> ---
>   xen/drivers/passthrough/arm/iommu.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/xen/drivers/passthrough/arm/iommu.c b/xen/drivers/passthrough/arm/iommu.c
> index 325997b..2135233 100644
> --- a/xen/drivers/passthrough/arm/iommu.c
> +++ b/xen/drivers/passthrough/arm/iommu.c
> @@ -32,7 +32,10 @@ void __init iommu_set_ops(const struct iommu_ops *ops)
>       BUG_ON(ops == NULL);
>   
>       if ( iommu_ops && iommu_ops != ops )
> +    {
>           printk("WARNING: Cannot set IOMMU ops, already set to a different value\n");
> +        return;
> +    }
>   
>       iommu_ops = ops;
>   }
> 

-- 
Julien Grall

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Re: [Xen-devel] [PATCH] iommu/arm: add missing return

Posted by Julien Grall 6 years, 8 months ago


On 11/06/2019 15:37, Julien Grall wrote:
> Hi Andrii,
> 
> Sorry for the late answer.
> 
> On 5/30/19 1:02 PM, Andrii Anisov wrote:
>> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
>>
>> In case iommu_ops have been already set, we should not update it.
>>
>> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
>> Signed-off-by: Andrii Anisov <andrii_anisov@epam.com>
> 
> Acked-by: Julien Grall <julien.grall@arm.com>

Now committed, thank you!

Cheers,

-- 
Julien Grall

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Re: [Xen-devel] [PATCH] iommu/arm: add missing return

Posted by Andrii Anisov 6 years, 8 months ago


On 11.06.19 18:12, Julien Grall wrote:
>> Acked-by: Julien Grall <julien.grall@arm.com>
> 
> Now committed, thank you!

Thank you.

-- 
Sincerely,
Andrii Anisov.

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