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xen/xenbus/xen_bus_type: Support will_handle watch callback 

This commit adds support of the 'will_handle' watch callback for
'xen_bus_type' users.

This is part of XSA-349

Cc: stable@vger.kernel.org
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reported-by: Michael Kurth <mku@amazon.de>
Reported-by: Pawel Wieczorkiewicz <wipawel@amazon.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
zero-sugar-mainline-defconfig
SeongJae Park 2020-12-14 10:05:47 +01:00 committed by Juergen Gross
parent 2e85d32b1c
commit be987200fb
2 changed files with 4 additions and 1 deletions
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2
drivers/xen/xenbus/xenbus.h
View File

@ -44,6 +44,8 @@ struct xen_bus_type {
int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename);
int (*probe)(struct xen_bus_type *bus, const char *type,
const char *dir);
bool (*otherend_will_handle)(struct xenbus_watch *watch,
const char *path, const char *token);
void (*otherend_changed)(struct xenbus_watch *watch, const char *path,
const char *token);
struct bus_type bus;

3
drivers/xen/xenbus/xenbus_probe.c
View File

@ -136,7 +136,8 @@ static int watch_otherend(struct xenbus_device *dev)
container_of(dev->dev.bus, struct xen_bus_type, bus);
return xenbus_watch_pathfmt(dev, &dev->otherend_watch,
NULL, bus->otherend_changed,
bus->otherend_will_handle,
bus->otherend_changed,
"%s/%s", dev->otherend, "state");
}