From 6c27f99d35f4d14b7fc5e50ae1f822d7cca6a5af Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Tue, 8 Nov 2016 00:45:53 -0700 Subject: [PATCH] xen-netback: prefer xenbus_scanf() over xenbus_gather() For single items being collected this should be preferred as being more typesafe (as the compiler can check format string and to-be-written-to variable match) and more efficient (requiring one less parameter to be passed). Signed-off-by: Jan Beulich Reviewed-by: Paul Durrant Signed-off-by: David S. Miller --- drivers/net/xen-netback/xenbus.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c index 8674e188b697..55a4488633e4 100644 --- a/drivers/net/xen-netback/xenbus.c +++ b/drivers/net/xen-netback/xenbus.c @@ -889,16 +889,16 @@ static int connect_ctrl_ring(struct backend_info *be) unsigned int evtchn; int err; - err = xenbus_gather(XBT_NIL, dev->otherend, - "ctrl-ring-ref", "%u", &val, NULL); - if (err) + err = xenbus_scanf(XBT_NIL, dev->otherend, + "ctrl-ring-ref", "%u", &val); + if (err < 0) goto done; /* The frontend does not have a control ring */ ring_ref = val; - err = xenbus_gather(XBT_NIL, dev->otherend, - "event-channel-ctrl", "%u", &val, NULL); - if (err) { + err = xenbus_scanf(XBT_NIL, dev->otherend, + "event-channel-ctrl", "%u", &val); + if (err < 0) { xenbus_dev_fatal(dev, err, "reading %s/event-channel-ctrl", dev->otherend); -- 2.30.2