lkml.org 
[lkml]   [2015]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[v6 8/8] iommu, x86: Properly handler PI for IOMMU hotplug
Date
Return error when inserting a new IOMMU which doesn't support PI
if PI is currently in use.

Signed-off-by: Feng Wu <feng.wu@intel.com>
---
drivers/iommu/intel_irq_remapping.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 776b65a..a0de9b9 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -1347,6 +1347,9 @@ int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
return -EINVAL;
if (!ecap_ir_support(iommu->ecap))
return 0;
+ if (irq_remapping_cap(IRQ_POSTING_CAP) &&
+ !cap_pi_support(iommu->cap))
+ return -EBUSY;

if (insert) {
if (!iommu->ir_table)
--
2.1.0


\
 
 \ /
  Last update: 2015-05-21 09:21    [W:0.064 / U:0.856 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site