Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Jason Wang <jasowang@redhat.com>
To:     mst@redhat.com, virtualization@lists.linux-foundation.org,
        linux-kernel@vger.kernel.org
Cc:     shahafs@mellanox.com, lulu@redhat.com, sgarzare@redhat.com,
        rdunlap@infradead.org, Jason Wang <jasowang@redhat.com>
Subject: [PATCH V3 08/19] virtio-pci-modern: introduce vp_modern_generation()
Date:   Mon,  4 Jan 2021 14:54:52 +0800
Message-Id: <20210104065503.199631-9-jasowang@redhat.com>
In-Reply-To: <20210104065503.199631-1-jasowang@redhat.com>
References: <20210104065503.199631-1-jasowang@redhat.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

This patch introduces vp_modern_generation() to get device generation.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 drivers/virtio/virtio_pci_modern.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index cb14fc334a9c..a128e5814045 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -289,15 +289,26 @@ static void vp_set(struct virtio_device *vdev, unsigned offset,
 	}
 }
 
-static u32 vp_generation(struct virtio_device *vdev)
+/*
+ * vp_modern_generation - get the device genreation
+ * @mdev: the modern virtio-pci device
+ *
+ * Returns the genreation read from device
+ */
+static u32 vp_modern_generation(struct virtio_pci_modern_device *mdev)
 {
-	struct virtio_pci_device *vp_dev = to_vp_device(vdev);
-	struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
 	struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
 
 	return vp_ioread8(&cfg->config_generation);
 }
 
+static u32 vp_generation(struct virtio_device *vdev)
+{
+	struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+
+	return vp_modern_generation(&vp_dev->mdev);
+}
+
 /*
  * vp_modern_get_status - get the device status
  * @mdev: the modern virtio-pci device
-- 
2.25.1