x86, dmar: use atomic allocations for QI and Intr-remapping init

Impact: invalid use of GFP_KERNEL in interrupt context

Queued invalidation and interrupt-remapping will get initialized with
interrupts disabled (while enabling interrupt-remapping). So use
GFP_ATOMIC instead of GFP_KERNEL for memory alloacations.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index f7ecd85e2104..bc5b6976f918 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -447,12 +447,12 @@ static int setup_intr_remapping(struct intel_iommu *iommu, int mode)
         struct page *pages;
 
         ir_table = iommu->ir_table = kzalloc(sizeof(struct ir_table),
-                                             GFP_KERNEL);
+                                             GFP_ATOMIC);
 
         if (!iommu->ir_table)
                 return -ENOMEM;
 
-        pages = alloc_pages(GFP_KERNEL | __GFP_ZERO, INTR_REMAP_PAGE_ORDER);
+        pages = alloc_pages(GFP_ATOMIC | __GFP_ZERO, INTR_REMAP_PAGE_ORDER);
 
         if (!pages) {
                 printk(KERN_ERR "failed to allocate pages of order %d\n",