2 files changed, 20 insertions, 22 deletions

diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c
index a341938c7e2c..3633202e18f4 100644
--- a/drivers/misc/mic/vop/vop_main.c
+++ b/drivers/misc/mic/vop/vop_main.c
@@ -452,10 +452,12 @@ static irqreturn_t vop_virtio_intr_handler(int irq, void *data)
 
 static void vop_virtio_release_dev(struct device *_d)
 {
-	/*
-	 * No need for a release method similar to virtio PCI.
-	 * Provide an empty one to avoid getting a warning from core.
-	 */
+	struct virtio_device *vdev =
+			container_of(_d, struct virtio_device, dev);
+	struct _vop_vdev *vop_vdev =
+			container_of(vdev, struct _vop_vdev, vdev);
+
+	kfree(vop_vdev);
 }
 
 /*
@@ -466,7 +468,7 @@ static int _vop_add_device(struct mic_device_desc __iomem *d,
 			   unsigned int offset, struct vop_device *vpdev,
 			   int dnode)
 {
-	struct _vop_vdev *vdev;
+	struct _vop_vdev *vdev, *reg_dev = NULL;
 	int ret;
 	u8 type = ioread8(&d->type);
 
@@ -497,6 +499,7 @@ static int _vop_add_device(struct mic_device_desc __iomem *d,
 	vdev->c2h_vdev_db = ioread8(&vdev->dc->c2h_vdev_db);
 
 	ret = register_virtio_device(&vdev->vdev);
+	reg_dev = vdev;
 	if (ret) {
 		dev_err(_vop_dev(vdev),
 			"Failed to register vop device %u type %u\n",
@@ -512,7 +515,10 @@ static int _vop_add_device(struct mic_device_desc __iomem *d,
 free_irq:
 	vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev);
 kfree:
-	kfree(vdev);
+	if (reg_dev)
+		put_device(&vdev->vdev.dev);
+	else
+		kfree(vdev);
 	return ret;
 }
 
@@ -568,7 +574,7 @@ static int _vop_remove_device(struct mic_device_desc __iomem *d,
 		iowrite8(-1, &dc->h2c_vdev_db);
 		if (status & VIRTIO_CONFIG_S_DRIVER_OK)
 			wait_for_completion(&vdev->reset_done);
-		kfree(vdev);
+		put_device(&vdev->vdev.dev);
 		iowrite8(1, &dc->guest_ack);
 		dev_dbg(&vpdev->dev, "%s %d guest_ack %d\n",
 			__func__, __LINE__, ioread8(&dc->guest_ack));
diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c
index 4120ed8f0cae..01d1f2ba7bb8 100644
--- a/drivers/misc/mic/vop/vop_vringh.c
+++ b/drivers/misc/mic/vop/vop_vringh.c
@@ -937,13 +937,10 @@ static long vop_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
 		    dd.num_vq > MIC_MAX_VRINGS)
 			return -EINVAL;
 
-		dd_config = kzalloc(mic_desc_size(&dd), GFP_KERNEL);
-		if (!dd_config)
-			return -ENOMEM;
-		if (copy_from_user(dd_config, argp, mic_desc_size(&dd))) {
-			ret = -EFAULT;
-			goto free_ret;
-		}
+		dd_config = memdup_user(argp, mic_desc_size(&dd));
+		if (IS_ERR(dd_config))
+			return PTR_ERR(dd_config);
+
 		/* Ensure desc has not changed between the two reads */
 		if (memcmp(&dd, dd_config, sizeof(dd))) {
 			ret = -EINVAL;
@@ -995,17 +992,12 @@ _unlock_ret:
 		ret = vop_vdev_inited(vdev);
 		if (ret)
 			goto __unlock_ret;
-		buf = kzalloc(vdev->dd->config_len, GFP_KERNEL);
-		if (!buf) {
-			ret = -ENOMEM;
+		buf = memdup_user(argp, vdev->dd->config_len);
+		if (IS_ERR(buf)) {
+			ret = PTR_ERR(buf);
 			goto __unlock_ret;
 		}
-		if (copy_from_user(buf, argp, vdev->dd->config_len)) {
-			ret = -EFAULT;
-			goto done;
-		}
 		ret = vop_virtio_config_change(vdev, buf);
-done:
 		kfree(buf);
 __unlock_ret:
 		mutex_unlock(&vdev->vdev_mutex);