| Message ID | 20210119050756.600-4-xieyongji@bytedance.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce VDUSE - vDPA Device in Userspace | expand |
On 2021/1/19 下午1:07, Xie Yongji wrote: > 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 <xieyongji@bytedance.com> Looks like a bug fix. If yes, let's squash this into patch 8. Thanks > --- > 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:
On Tue, Jan 26, 2021 at 4:10 PM Jason Wang <jasowang@redhat.com> wrote: > > > On 2021/1/19 下午1:07, Xie Yongji wrote: > > 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 <xieyongji@bytedance.com> > > > Looks like a bug fix. If yes, let's squash this into patch 8. > Will do it. Thanks, Yongji
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:
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 <xieyongji@bytedance.com> --- drivers/vdpa/vdpa_user/vduse_dev.c | 2 ++ 1 file changed, 2 insertions(+)