diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-01-07 01:52:19 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-02-01 17:26:46 +0300 |
| commit | e050c7d93f4adb2a651711e2d4e0a86d41b9d76f (patch) | |
| tree | 9e9e3387eadf9365189c35bdeec2b653419d2440 /drivers/vhost/vhost.c | |
| parent | 03ee47ae8a7c608975be7e45287bff0482e295d6 (diff) | |
| download | linux-e050c7d93f4adb2a651711e2d4e0a86d41b9d76f.tar.xz | |
vhost: don't hold onto file pointer for VHOST_SET_VRING_CALL
We already hold a reference to the eventfd_ctx, which is sufficient;
there's no need to hold a reference to the struct file as well. So get
rid of vhost_virtqueue->call.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers/vhost/vhost.c')
| -rw-r--r-- | drivers/vhost/vhost.c | 20 |
1 files changed, 5 insertions, 15 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index e5eba5acfd55..7bf0b734ae70 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -321,7 +321,6 @@ static void vhost_vq_reset(struct vhost_dev *dev, vq->error = NULL; vq->kick = NULL; vq->call_ctx = NULL; - vq->call = NULL; vq->log_ctx = NULL; vhost_reset_is_le(vq); vhost_disable_cross_endian(vq); @@ -623,8 +622,6 @@ void vhost_dev_cleanup(struct vhost_dev *dev) fput(dev->vqs[i]->kick); if (dev->vqs[i]->call_ctx) eventfd_ctx_put(dev->vqs[i]->call_ctx); - if (dev->vqs[i]->call) - fput(dev->vqs[i]->call); vhost_vq_reset(dev, dev->vqs[i]); } vhost_dev_free_iovecs(dev); @@ -1490,19 +1487,12 @@ long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp) r = -EFAULT; break; } - eventfp = f.fd == -1 ? NULL : eventfd_fget(f.fd); - if (IS_ERR(eventfp)) { - r = PTR_ERR(eventfp); + ctx = f.fd == -1 ? NULL : eventfd_ctx_fdget(f.fd); + if (IS_ERR(ctx)) { + r = PTR_ERR(ctx); break; } - if (eventfp != vq->call) { - filep = vq->call; - ctx = vq->call_ctx; - vq->call = eventfp; - vq->call_ctx = eventfp ? - eventfd_ctx_fileget(eventfp) : NULL; - } else - filep = eventfp; + swap(ctx, vq->call_ctx); break; case VHOST_SET_VRING_ERR: if (copy_from_user(&f, argp, sizeof f)) { @@ -1549,7 +1539,7 @@ long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp) if (pollstop && vq->handle_kick) vhost_poll_stop(&vq->poll); - if (ctx) + if (!IS_ERR_OR_NULL(ctx)) eventfd_ctx_put(ctx); if (filep) fput(filep); |