[PATCH v7 2/9] iommu/vt-d: Change flags type to unsigned int in binding mm

[Fenghua Yu]

"flags" passed to intel_svm_bind_mm() is a bit mask and should be
defined as "unsigned int" instead of "int".

Change its type to "unsigned int".

Suggested-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx>
Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
v5:
- Reviewed by Lu Baolu

v2:
- Add this new patch per Thomas' comment.

 drivers/iommu/intel/svm.c   | 7 ++++---
 include/linux/intel-iommu.h | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index e78a74a9c1cf..fc90a079e228 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -446,7 +446,8 @@ int intel_svm_unbind_gpasid(struct device *dev, u32 pasid)
 
 /* Caller must hold pasid_mutex, mm reference */
 static int
-intel_svm_bind_mm(struct device *dev, int flags, struct svm_dev_ops *ops,
+intel_svm_bind_mm(struct device *dev, unsigned int flags,
+		  struct svm_dev_ops *ops,
 		  struct mm_struct *mm, struct intel_svm_dev **sd)
 {
 	struct intel_iommu *iommu = device_to_iommu(dev, NULL, NULL);
@@ -1033,7 +1034,7 @@ intel_svm_bind(struct device *dev, struct mm_struct *mm, void *drvdata)
 {
 	struct iommu_sva *sva = ERR_PTR(-EINVAL);
 	struct intel_svm_dev *sdev = NULL;
-	int flags = 0;
+	unsigned int flags = 0;
 	int ret;
 
 	/*
@@ -1042,7 +1043,7 @@ intel_svm_bind(struct device *dev, struct mm_struct *mm, void *drvdata)
 	 * and intel_svm etc.
 	 */
 	if (drvdata)
-		flags = *(int *)drvdata;
+		flags = *(unsigned int *)drvdata;
 	mutex_lock(&pasid_mutex);
 	ret = intel_svm_bind_mm(dev, flags, NULL, mm, &sdev);
 	if (ret)
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 7322073f62d0..9c3e8337442a 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -765,7 +765,7 @@ struct intel_svm {
 	struct mm_struct *mm;
 
 	struct intel_iommu *iommu;
-	int flags;
+	unsigned int flags;
 	u32 pasid;
 	int gpasid; /* In case that guest PASID is different from host PASID */
 	struct list_head devs;
-- 
2.19.1