linux-kernel - [tip: x86/pasid] iommu/vt-d: Change flags type to unsigned int in binding mm

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Date:   Fri, 18 Sep 2020 07:42:33 -0000
From:   "tip-bot2 for Fenghua Yu" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Borislav Petkov <bp@...e.de>, Tony Luck <tony.luck@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <jroedel@...e.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/pasid] iommu/vt-d: Change flags type to unsigned int in binding mm

The following commit has been merged into the x86/pasid branch of tip:

Commit-ID:     2a5054c6e7b16906984ac36a7363ca46b8d99ade
Gitweb:        https://git.kernel.org/tip/2a5054c6e7b16906984ac36a7363ca46b8d99ade
Author:        Fenghua Yu <fenghua.yu@...el.com>
AuthorDate:    Tue, 15 Sep 2020 09:30:06 -07:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Thu, 17 Sep 2020 19:21:30 +02:00

iommu/vt-d: Change flags type to unsigned int in binding mm

"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@...utronix.de>
Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>
Acked-by: Joerg Roedel <jroedel@...e.de>
Link: https://lkml.kernel.org/r/1600187413-163670-3-git-send-email-fenghua.yu@intel.com
---
 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 e78a74a..fc90a07 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -446,7 +446,8 @@ out:
 
 /* 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 7322073..9c3e833 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;