[RFC v3 10/11] vduse: grab the module's references until there is no vduse device
From: Xie Yongji <hidden>
Date: 2021-01-19 07:17:42
Also in:
kvm, linux-fsdevel
Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
The module should not be unloaded if any vduse device exists. So increase the module's reference count when creating vduse device. And the reference count is kept until the device is destroyed. Signed-off-by: Xie Yongji <redacted> --- drivers/vdpa/vdpa_user/vduse_dev.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 4d21203da5b6..003aeb281bce 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c@@ -978,6 +978,7 @@ static int vduse_destroy_dev(u32 id) kfree(dev->vqs); vduse_domain_destroy(dev->domain); vduse_dev_destroy(dev); + module_put(THIS_MODULE); return 0; }
@@ -1022,6 +1023,7 @@ static int vduse_create_dev(struct vduse_dev_config *config) dev->connected = true; list_add(&dev->list, &vduse_devs); + __module_get(THIS_MODULE); return fd; err_fd:
--
2.11.0