iommu/shmobile: Allocate archdata with kzalloc()

The archdata attached_list field isn't initialized, leading to random
crashes when accessed. Use kzalloc() to allocate the whole structure and
make sure all fields get initialized properly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/iommu/shmobile-iommu.c b/drivers/iommu/shmobile-iommu.c
index d572863dfccd..7a3b928fad1c 100644
--- a/drivers/iommu/shmobile-iommu.c
+++ b/drivers/iommu/shmobile-iommu.c
@@ -380,14 +380,13 @@ int ipmmu_iommu_init(struct shmobile_ipmmu *ipmmu)
                 kmem_cache_destroy(l1cache);
                 return -ENOMEM;
         }
-        archdata = kmalloc(sizeof(*archdata), GFP_KERNEL);
+        archdata = kzalloc(sizeof(*archdata), GFP_KERNEL);
         if (!archdata) {
                 kmem_cache_destroy(l1cache);
                 kmem_cache_destroy(l2cache);
                 return -ENOMEM;
         }
         spin_lock_init(&archdata->attach_lock);
-        archdata->attached = NULL;
         archdata->ipmmu = ipmmu;
         ipmmu_archdata = archdata;
         bus_set_iommu(&platform_bus_type, &shmobile_iommu_ops);