From: Yang Yingliang <yangyingliang@huawei.com>
To: Lu Baolu <baolu.lu@linux.intel.com>,
<iommu@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] iommu: fix return error code in iommu_probe_device()
Date: Tue, 17 Nov 2020 19:11:28 +0800 [thread overview]
Message-ID: <454f5e3e-c380-e8a5-9283-3f7578eb601e@huawei.com> (raw)
In-Reply-To: <835ab066-b6b8-a211-4941-c01781031de8@linux.intel.com>
On 2020/11/17 17:40, Lu Baolu wrote:
> Hi Yingliang,
>
> On 2020/11/17 10:52, Yang Yingliang wrote:
>> If iommu_group_get() failed, it need return error code
>> in iommu_probe_device().
>>
>> Fixes: cf193888bfbd ("iommu: Move new probe_device path...")
>> Reported-by: Hulk Robot <hulkci@huawei.com>
>> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
>> ---
>> drivers/iommu/iommu.c | 4 +++-
>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
>> index b53446bb8c6b..6f4a32df90f6 100644
>> --- a/drivers/iommu/iommu.c
>> +++ b/drivers/iommu/iommu.c
>> @@ -253,8 +253,10 @@ int iommu_probe_device(struct device *dev)
>> goto err_out;
>> group = iommu_group_get(dev);
>> - if (!group)
>> + if (!group) {
>> + ret = -ENODEV;
>
> Can you please explain why you use -ENODEV here?
Before 79659190ee97 ("iommu: Don't take group reference in
iommu_alloc_default_domain()"), in
iommu_alloc_default_domain(), if group is NULL, it will return -ENODEV.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/iommu/iommu.c?h=v5.10-rc4&id=70b8170e55d3ca9503a53211967faee6b5f18b19
>
> Best regards,
> baolu
>
>> goto err_release;
>> + }
>> /*
>> * Try to allocate a default domain - needs support from the
>>
> .
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next prev parent reply other threads:[~2020-11-17 11:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-17 2:52 [PATCH] iommu: fix return error code in iommu_probe_device() Yang Yingliang
2020-11-17 9:40 ` Lu Baolu
2020-11-17 11:11 ` Yang Yingliang [this message]
2020-11-17 22:41 ` Will Deacon
2020-11-25 1:54 ` Yang Yingliang
2020-11-25 11:35 ` Will Deacon
2020-11-26 2:29 ` Yang Yingliang
2020-11-26 8:59 ` Will Deacon
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