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authorSeongJae Park <sjpark@amazon.de>2020-12-14 12:05:47 +0300
committerJuergen Gross <jgross@suse.com>2020-12-14 12:05:47 +0300
commitbe987200fbaceaef340872841d4f7af2c5ee8dc3 (patch)
tree431f88bcf2e666092e7c70a01103896e28beefb2 /drivers/xen
parent2e85d32b1c865bec703ce0c962221a5e955c52c2 (diff)
downloadlinux-be987200fbaceaef340872841d4f7af2c5ee8dc3.tar.xz
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>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/xenbus/xenbus.h2
-rw-r--r--drivers/xen/xenbus/xenbus_probe.c3
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/xen/xenbus/xenbus.h b/drivers/xen/xenbus/xenbus.h
index 5f5b8a7d5b80..2a93b7c9c159 100644
--- a/drivers/xen/xenbus/xenbus.h
+++ b/drivers/xen/xenbus/xenbus.h
@@ -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;
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 4c3d1b84aa0a..44634d970a5c 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -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");
}