From: Eric Biggers <ebiggers@xxxxxxxxxx>
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_dev->log_file.
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
drivers/vhost/vhost.c | 24 +++++-------------------
drivers/vhost/vhost.h | 1 -
2 files changed, 5 insertions(+), 20 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 39e184b168ce..67ea87a4a526 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -420,7 +420,6 @@ void vhost_dev_init(struct vhost_dev *dev,
dev->nvqs = nvqs;
mutex_init(&dev->mutex);
dev->log_ctx = NULL;
- dev->log_file = NULL;
dev->umem = NULL;
dev->iotlb = NULL;
dev->mm = NULL;
@@ -627,9 +626,6 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked)
if (dev->log_ctx)
eventfd_ctx_put(dev->log_ctx);
dev->log_ctx = NULL;
- if (dev->log_file)
- fput(dev->log_file);
- dev->log_file = NULL;
/* No one will access memory at this point */
vhost_umem_clean(dev->umem);
dev->umem = NULL;
@@ -1570,8 +1566,7 @@ EXPORT_SYMBOL_GPL(vhost_init_device_iotlb);
/* Caller must have device mutex */
long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
{
- struct file *eventfp, *filep = NULL;
- struct eventfd_ctx *ctx = NULL;
+ struct eventfd_ctx *ctx;
u64 p;
long r;
int i, fd;
@@ -1617,19 +1612,12 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
r = get_user(fd, (int __user *)argp);
if (r < 0)
break;
- eventfp = fd == -1 ? NULL : eventfd_fget(fd);
- if (IS_ERR(eventfp)) {
- r = PTR_ERR(eventfp);
+ ctx = fd == -1 ? NULL : eventfd_ctx_fdget(fd);
+ if (IS_ERR(ctx)) {
+ r = PTR_ERR(ctx);
break;
}
- if (eventfp != d->log_file) {
- filep = d->log_file;
- d->log_file = eventfp;
- ctx = d->log_ctx;
- d->log_ctx = eventfp ?
- eventfd_ctx_fileget(eventfp) : NULL;
- } else
- filep = eventfp;
+ swap(ctx, d->log_ctx);
for (i = 0; i < d->nvqs; ++i) {
mutex_lock(&d->vqs[i]->mutex);
d->vqs[i]->log_ctx = d->log_ctx;
@@ -1637,8 +1625,6 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
}
if (ctx)
eventfd_ctx_put(ctx);
- if (filep)
- fput(filep);
break;
default:
r = -ENOIOCTLCMD;
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 3fe82323f667..da86623871d9 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -161,7 +161,6 @@ struct vhost_dev {
struct mutex mutex;
struct vhost_virtqueue **vqs;
int nvqs;
- struct file *log_file;
struct eventfd_ctx *log_ctx;
struct llist_head work_list;
struct task_struct *worker;
--
2.15.1
