ia64/xen-unstable

changeset 6775:0fad07d67e75

Prevent opening the xenbus device if the store isn't connected yet.
Running xenstore clients using the xenbus device before the store
connection has been set up causes a crash because the store page
won't have been allocated yet. This is only a problem in dom0 where
we setup the store page from the PRIVCMD_INITDOMAIN_STORE ioctl.
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
author cl349@firebug.cl.cam.ac.uk
date Tue Sep 13 10:05:49 2005 +0000 (2005-09-13)
parents f804b28871ba
children 69bf4490062f 4d018790ff8a
files linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_dev.c
line diff
     1.1 --- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_dev.c	Tue Sep 13 09:11:58 2005 +0000
     1.2 +++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_dev.c	Tue Sep 13 10:05:49 2005 +0000
     1.3 @@ -130,6 +130,9 @@ static int xenbus_dev_open(struct inode 
     1.4  {
     1.5  	struct xenbus_dev_data *u;
     1.6  
     1.7 +	if (xen_start_info->store_evtchn == 0)
     1.8 +		return -ENOENT;
     1.9 +
    1.10  	/* Don't try seeking. */
    1.11  	nonseekable_open(inode, filp);
    1.12