From: Jiang Liu <jiang.liu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Yinghai Lu <yinghai@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vinod.koul@intel.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>,
Ashok Raj <ashok.raj@intel.com>,
Yijing Wang <wangyijing@huawei.com>,
Tony Luck <tony.luck@intel.com>,
iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org,
linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org,
dmaengine@vger.kernel.org
Subject: [Patch Part3 V7 6/8] iommu/vt-d: Enhance error recovery in function intel_enable_irq_remapping()
Date: Sun, 9 Nov 2014 22:48:01 +0800 [thread overview]
Message-ID: <1415544483-27990-7-git-send-email-jiang.liu@linux.intel.com> (raw)
In-Reply-To: <1415544483-27990-1-git-send-email-jiang.liu@linux.intel.com>
Enhance error recovery in function intel_enable_irq_remapping()
by tearing down all created data structures.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@huawei.com>
---
drivers/iommu/intel_irq_remapping.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 7af0b56dc2d1..27541d440849 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -702,9 +702,11 @@ static int __init intel_enable_irq_remapping(void)
return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE;
error:
- /*
- * handle error condition gracefully here!
- */
+ for_each_iommu(iommu, drhd)
+ if (ecap_ir_support(iommu->ecap)) {
+ iommu_disable_irq_remapping(iommu);
+ intel_teardown_irq_remapping(iommu);
+ }
if (x2apic_present)
pr_warn("Failed to enable irq remapping. You are vulnerable to irq-injection attacks.\n");
--
1.7.10.4
next prev parent reply other threads:[~2014-11-09 14:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-09 14:47 [Patch Part3 V7 0/8] Enable support of Intel DMAR device hotplug Jiang Liu
2014-11-09 14:47 ` [Patch Part3 V7 1/8] iommu/vt-d: Introduce helper function dmar_walk_resources() Jiang Liu
2014-11-09 14:47 ` [Patch Part3 V7 2/8] iommu/vt-d: Dynamically allocate and free seq_id for DMAR units Jiang Liu
2014-11-09 14:47 ` [Patch Part3 V7 3/8] iommu/vt-d: Implement DMAR unit hotplug framework Jiang Liu
2014-11-09 14:47 ` [Patch Part3 V7 4/8] iommu/vt-d: Search for ACPI _DSM method for DMAR hotplug Jiang Liu
2014-11-09 14:48 ` [Patch Part3 V7 5/8] iommu/vt-d: Enhance intel_irq_remapping driver to support DMAR unit hotplug Jiang Liu
2014-11-09 14:48 ` Jiang Liu [this message]
2014-11-09 14:48 ` [Patch Part3 V7 7/8] iommu/vt-d: Enhance intel-iommu " Jiang Liu
2014-11-09 14:48 ` [Patch Part3 V7 8/8] pci, ACPI, iommu: Enhance pci_root to support DMAR device hotplug Jiang Liu
2014-11-18 10:25 ` [Patch Part3 V7 0/8] Enable support of Intel " Joerg Roedel
2014-11-18 12:57 ` Jiang Liu
2014-11-18 14:28 ` Joerg Roedel
2014-11-18 14:54 ` Jiang Liu
2014-11-18 15:21 ` Joerg Roedel
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