[Xen-changelog] [xen-unstable] [XENBUS] Cleanup correctly on suspend, unregister watches.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxxx
# Node ID 7258181ab445dcdcdb5da7a5c0db05906ae3923a
# Parent  3fc16c39f15e78d1ab1b1abf82a26cb631f7fca5
[XENBUS] Cleanup correctly on suspend, unregister watches.
Again needed for domU kexec, so the next kernel instance can register
watches without running into -EBUSY.

Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxx>
---
 linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c |   10 ++++++++++
 1 files changed, 10 insertions(+)

diff -r 3fc16c39f15e -r 7258181ab445 
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c       Sat Aug 19 
10:20:08 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c       Sat Aug 19 
10:21:02 2006 +0100
@@ -665,7 +665,17 @@ EXPORT_SYMBOL_GPL(unregister_xenbus_watc
 
 void xs_suspend(void)
 {
+       struct xenbus_watch *watch;
+       char token[sizeof(watch) * 2 + 1];
+
        down_write(&xs_state.suspend_mutex);
+
+       /* No need for watches_lock: the suspend_mutex is sufficient. */
+       list_for_each_entry(watch, &watches, list) {
+               sprintf(token, "%lX", (long)watch);
+               xs_unwatch(watch->node, token);
+       }
+
        mutex_lock(&xs_state.request_mutex);
 }
 

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