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-rw-r--r--fs/notify/fanotify/fanotify_user.c46
1 files changed, 24 insertions, 22 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 2a57278afb80..f1097f56137e 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -275,35 +275,37 @@ static ssize_t fanotify_read(struct file *file, char __user *buf,
kevent = get_one_event(group, count);
mutex_unlock(&group->notification_mutex);
- if (kevent) {
+ if (IS_ERR(kevent)) {
ret = PTR_ERR(kevent);
- if (IS_ERR(kevent))
+ break;
+ }
+
+ if (!kevent) {
+ ret = -EAGAIN;
+ if (file->f_flags & O_NONBLOCK)
break;
- ret = copy_event_to_user(group, kevent, buf);
- /*
- * Permission events get queued to wait for response.
- * Other events can be destroyed now.
- */
- if (!(kevent->mask & FAN_ALL_PERM_EVENTS))
- fsnotify_destroy_event(group, kevent);
- if (ret < 0)
+
+ ret = -ERESTARTSYS;
+ if (signal_pending(current))
+ break;
+
+ if (start != buf)
break;
- buf += ret;
- count -= ret;
+ schedule();
continue;
}
- ret = -EAGAIN;
- if (file->f_flags & O_NONBLOCK)
- break;
- ret = -ERESTARTSYS;
- if (signal_pending(current))
- break;
-
- if (start != buf)
+ ret = copy_event_to_user(group, kevent, buf);
+ /*
+ * Permission events get queued to wait for response. Other
+ * events can be destroyed now.
+ */
+ if (!(kevent->mask & FAN_ALL_PERM_EVENTS))
+ fsnotify_destroy_event(group, kevent);
+ if (ret < 0)
break;
-
- schedule();
+ buf += ret;
+ count -= ret;
}
finish_wait(&group->notification_waitq, &wait);