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authorJoerg Roedel <jroedel@suse.de>2015-06-12 15:15:34 +0200
committerJoerg Roedel <jroedel@suse.de>2015-06-16 10:59:36 +0200
commit571dbbd4d044e11c78bc077acb3ccef4c77b096e (patch)
tree379944a6140210680cf24e05987d3119a672740a /drivers/iommu/intel_irq_remapping.c
parent7c3c9876d98a76b97d16c0f46cb108e95542b212 (diff)
iommu/vt-d: Don't disable IR when it was previously enabled
Keep it enabled in kdump kernel to guarantee interrupt delivery. Tested-by: ZhenHua Li <zhen-hual@hp.com> Tested-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel_irq_remapping.c')
-rw-r--r--drivers/iommu/intel_irq_remapping.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 14e10de4a548..47fcebf39e9e 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -742,9 +742,6 @@ static int __init intel_prepare_irq_remapping(void)
pr_info("%s does not support EIM\n", iommu->name);
eim = 0;
}
-
- /* Disable IRQ remapping if it is already enabled */
- iommu_disable_irq_remapping(iommu);
}
eim_mode = eim;
@@ -777,7 +774,8 @@ static int __init intel_enable_irq_remapping(void)
* Setup Interrupt-remapping for all the DRHD's now.
*/
for_each_iommu(iommu, drhd) {
- iommu_enable_irq_remapping(iommu);
+ if (!ir_pre_enabled(iommu))
+ iommu_enable_irq_remapping(iommu);
setup = true;
}