From: Joerg Roedel <joro@8bytes.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH 1/1] iommu: Fix deferred domain attachment in iommu_probe_device()
Date: Tue, 3 Nov 2020 14:23:58 +0100 [thread overview]
Message-ID: <20201103132358.GG22888@8bytes.org> (raw)
In-Reply-To: <20201026063008.24849-1-baolu.lu@linux.intel.com>
Hi Baolu,
On Mon, Oct 26, 2020 at 02:30:08PM +0800, Lu Baolu wrote:
> @@ -264,7 +266,8 @@ int iommu_probe_device(struct device *dev)
> */
> iommu_alloc_default_domain(group, dev);
>
> - if (group->default_domain)
> + if (group->default_domain &&
> + !iommu_is_attach_deferred(group->default_domain, dev))
> ret = __iommu_attach_device(group->default_domain, dev);
This is the hotplug path, not used for boot-initialization. Have you
seen failures from the missing check here?
Regards,
Joerg
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WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH 1/1] iommu: Fix deferred domain attachment in iommu_probe_device()
Date: Tue, 3 Nov 2020 14:23:58 +0100 [thread overview]
Message-ID: <20201103132358.GG22888@8bytes.org> (raw)
In-Reply-To: <20201026063008.24849-1-baolu.lu@linux.intel.com>
Hi Baolu,
On Mon, Oct 26, 2020 at 02:30:08PM +0800, Lu Baolu wrote:
> @@ -264,7 +266,8 @@ int iommu_probe_device(struct device *dev)
> */
> iommu_alloc_default_domain(group, dev);
>
> - if (group->default_domain)
> + if (group->default_domain &&
> + !iommu_is_attach_deferred(group->default_domain, dev))
> ret = __iommu_attach_device(group->default_domain, dev);
This is the hotplug path, not used for boot-initialization. Have you
seen failures from the missing check here?
Regards,
Joerg
next prev parent reply other threads:[~2020-11-03 13:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 6:30 [PATCH 1/1] iommu: Fix deferred domain attachment in iommu_probe_device() Lu Baolu
2020-10-26 6:30 ` Lu Baolu
2020-11-03 13:23 ` Joerg Roedel [this message]
2020-11-03 13:23 ` Joerg Roedel
2020-11-04 1:01 ` Lu Baolu
2020-11-04 1:01 ` Lu Baolu
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