From: SeongJae Park sjpark@amazon.de
This commit adds support of the 'will_handle' watch callback for 'xen_bus_type' users.
This is part of XSA-349
This is upstream commit be987200fbaceaef340872841d4f7af2c5ee8dc3
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 Signed-off-by: Author Redacted security@xen.org Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com --- drivers/xen/xenbus/xenbus_probe.c | 3 ++- drivers/xen/xenbus/xenbus_probe.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index c560c1b8489a..ba7590d75985 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -137,7 +137,8 @@ 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"); }
diff --git a/drivers/xen/xenbus/xenbus_probe.h b/drivers/xen/xenbus/xenbus_probe.h index c9ec7ca1f7ab..2c394c6ba605 100644 --- a/drivers/xen/xenbus/xenbus_probe.h +++ b/drivers/xen/xenbus/xenbus_probe.h @@ -42,6 +42,8 @@ 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 **vec, unsigned int len); void (*otherend_changed)(struct xenbus_watch *watch, const char **vec, unsigned int len); struct bus_type bus;