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iommu/vt-d: Tylersburg isoch identity map check is done too late.

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commit 21e722c4c8377b5bc82ad058fed12165af739c1b upstream.

The check to set identity map for tylersburg is done too late. It needs
to be done before the check for identity_map domain is done.

To: Joerg Roedel <joro@8bytes.org>
To: David Woodhouse <dwmw2@infradead.org>
Cc: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Cc: Ashok Raj <ashok.raj@intel.com>

Fixes: 86080ccc22 ("iommu/vt-d: Allocate si_domain in init_dmars()")
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Reported-by: Yunhong Jiang <yunhong.jiang@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ashok Raj 2017-01-30 09:39:53 -08:00 committed by Greg Kroah-Hartman
parent 61cb3c6357
commit 24427cd71d
1 changed files with 2 additions and 1 deletions
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3
drivers/iommu/intel-iommu.c
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@ -3325,13 +3325,14 @@ static int __init init_dmars(void)
iommu_identity_mapping |= IDENTMAP_GFX;
#endif
check_tylersburg_isoch();
if (iommu_identity_mapping) {
ret = si_domain_init(hw_pass_through);
if (ret)
goto free_iommu;
}
check_tylersburg_isoch();
/*
* If we copied translations from a previous kernel in the kdump