Support the suspend operation. There is little to do, except flush to
guarantee no workers are running when suspend returns.
Signed-off-by: Steve Sistare <steven.sistare@xxxxxxxxxx>
---
drivers/vdpa/vdpa_user/vduse_dev.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 73c89701fc9d..7dc46f771f12 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -472,6 +472,18 @@ static void vduse_dev_reset(struct vduse_dev *dev)
up_write(&dev->rwsem);
}
+static void vduse_flush_work(struct vduse_dev *dev)
+{
+ flush_work(&dev->inject);
+
+ for (int i = 0; i < dev->vq_num; i++) {
+ struct vduse_virtqueue *vq = dev->vqs[i];
+
+ flush_work(&vq->inject);
+ flush_work(&vq->kick);
+ }
+}
+
static int vduse_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 idx,
u64 desc_area, u64 driver_area,
u64 device_area)
@@ -724,6 +736,17 @@ static int vduse_vdpa_reset(struct vdpa_device *vdpa)
return ret;
}
+static int vduse_vdpa_suspend(struct vdpa_device *vdpa)
+{
+ struct vduse_dev *dev = vdpa_to_vduse(vdpa);
+
+ down_write(&dev->rwsem);
+ vduse_flush_work(dev);
+ up_write(&dev->rwsem);
+
+ return 0;
+}
+
static u32 vduse_vdpa_get_generation(struct vdpa_device *vdpa)
{
struct vduse_dev *dev = vdpa_to_vduse(vdpa);
@@ -806,6 +829,7 @@ static const struct vdpa_config_ops vduse_vdpa_config_ops = {
.set_vq_affinity = vduse_vdpa_set_vq_affinity,
.get_vq_affinity = vduse_vdpa_get_vq_affinity,
.reset = vduse_vdpa_reset,
+ .suspend = vduse_vdpa_suspend,
.set_map = vduse_vdpa_set_map,
.free = vduse_vdpa_free,
};
--
2.39.3
