diff options
Diffstat (limited to 'drivers/xen/xenfs/xenbus.c')
| -rw-r--r-- | drivers/xen/xenfs/xenbus.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/xen/xenfs/xenbus.c b/drivers/xen/xenfs/xenbus.c index f28ece397361..1c1236087f78 100644 --- a/drivers/xen/xenfs/xenbus.c +++ b/drivers/xen/xenfs/xenbus.c @@ -124,6 +124,9 @@ static ssize_t xenbus_file_read(struct file *filp, mutex_lock(&u->reply_mutex); while (list_empty(&u->read_buffers)) { mutex_unlock(&u->reply_mutex); + if (filp->f_flags & O_NONBLOCK) + return -EAGAIN; + ret = wait_event_interruptible(u->read_waitq, !list_empty(&u->read_buffers)); if (ret) @@ -591,4 +594,5 @@ const struct file_operations xenbus_file_ops = { .open = xenbus_file_open, .release = xenbus_file_release, .poll = xenbus_file_poll, + .llseek = no_llseek, }; |