[Xen-devel] Possible bug in xenbus __xenbus_switch_state

[Andrew Reimers]

HI,

Looking at the function __xenbus_switch_state in file 
source/drivers/xen/xenbus/xenbus_client.c,

The comment says:

"We check whether the state is currently set to the given value, and
           if not, then the state is set."

The code loads the old state value, but never does anything with it.

I would expect it to look something like:

err = xenbus_scanf(xbt, dev->nodename, "state", "%d", &current_state);
if (err != 1 || current_state != state) {
        err = xenbus_printf(xbt, dev->nodename, "state", "%d", state);
                if (err) {
                xenbus_switch_fatal(dev, depth, err, "writing new state");
                goto abort;
        }
}

--
Andrew Reimers
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