2 files changed, 12 insertions, 43 deletions

diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index aec0fbdfe7f0..5f284ffd430e 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -492,6 +492,7 @@ struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
                                         int is_async, int *fd)
 {
         struct ib_uverbs_event_file *ev_file;
+        struct path path;
         struct file *filp;
         int ret;
 
@@ -519,8 +520,10 @@ struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
          * system call on a uverbs file, which will already have a
          * module reference.
          */
-        filp = alloc_file(uverbs_event_mnt, dget(uverbs_event_mnt->mnt_root),
-                          FMODE_READ, fops_get(&uverbs_event_fops));
+        path.mnt = uverbs_event_mnt;
+        path.dentry = uverbs_event_mnt->mnt_root;
+        path_get(&path);
+        filp = alloc_file(&path, FMODE_READ, fops_get(&uverbs_event_fops));
         if (!filp) {
                 ret = -ENFILE;
                 goto err_fd;
@@ -531,6 +534,8 @@ struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
         return filp;
 
 err_fd:
+        fops_put(&uverbs_event_fops);
+        path_put(&path);
         put_unused_fd(*fd);
 
 err:
diff --git a/drivers/staging/dst/dcore.c b/drivers/staging/dst/dcore.c
index fd5bd0ea1e0d..c83ca7e3d048 100644
--- a/drivers/staging/dst/dcore.c
+++ b/drivers/staging/dst/dcore.c
@@ -403,7 +403,7 @@ static void dst_node_cleanup(struct dst_node *n)
 
         if (n->bdev) {
                 sync_blockdev(n->bdev);
-                blkdev_put(n->bdev, FMODE_READ|FMODE_WRITE);
+                close_bdev_exclusive(n->bdev, FMODE_READ|FMODE_WRITE);
         }
 
         dst_state_lock(st);
@@ -464,37 +464,6 @@ void dst_node_put(struct dst_node *n)
 }
 
 /*
- * This function finds devices major/minor numbers for given pathname.
- */
-static int dst_lookup_device(const char *path, dev_t *dev)
-{
-        int err;
-        struct nameidata nd;
-        struct inode *inode;
-
-        err = path_lookup(path, LOOKUP_FOLLOW, &nd);
-        if (err)
-                return err;
-
-        inode = nd.path.dentry->d_inode;
-        if (!inode) {
-                err = -ENOENT;
-                goto out;
-        }
-
-        if (!S_ISBLK(inode->i_mode)) {
-                err = -ENOTBLK;
-                goto out;
-        }
-
-        *dev = inode->i_rdev;
-
-out:
-        path_put(&nd.path);
-        return err;
-}
-
-/*
  * Setting up export device: lookup by the name, get its size
  * and setup listening socket, which will accept clients, which
  * will submit IO for given storage.
@@ -503,17 +472,12 @@ static int dst_setup_export(struct dst_node *n, struct dst_ctl *ctl,
                 struct dst_export_ctl *le)
 {
         int err;
-        dev_t dev = 0; /* gcc likes to scream here */
 
         snprintf(n->info->local, sizeof(n->info->local), "%s", le->device);
 
-        err = dst_lookup_device(le->device, &dev);
-        if (err)
-                return err;
-
-        n->bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
-        if (!n->bdev)
-                return -ENODEV;
+        n->bdev = open_bdev_exclusive(le->device, FMODE_READ|FMODE_WRITE, NULL);
+        if (IS_ERR(n->bdev))
+                return PTR_ERR(n->bdev);
 
         if (n->size != 0)
                 n->size = min_t(loff_t, n->bdev->bd_inode->i_size, n->size);
@@ -528,7 +492,7 @@ static int dst_setup_export(struct dst_node *n, struct dst_ctl *ctl,
         return 0;
 
 err_out_cleanup:
-        blkdev_put(n->bdev, FMODE_READ|FMODE_WRITE);
+        close_bdev_exclusive(n->bdev, FMODE_READ|FMODE_WRITE);
         n->bdev = NULL;
 
         return err;