iommu/vt-d: Zero out allocated memory in dmar_enable_qi

kmemcheck complained about the use of uninitialized memory.
Fix by using kzalloc instead of kmalloc.

Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 86e2f4a62b9a95fed887dda18b6bd5bdd2cdacda..2623a570ad2f3ceb46b72bf8aa21dceec853611e 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1040,7 +1040,7 @@ int dmar_enable_qi(struct intel_iommu *iommu)
 
        qi->desc = page_address(desc_page);
 
-       qi->desc_status = kmalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC);
+       qi->desc_status = kzalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC);
        if (!qi->desc_status) {
                free_page((unsigned long) qi->desc);
                kfree(qi);