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authorJan Beulich <JBeulich@suse.com>2016-11-08 00:45:53 -0700
committerDavid S. Miller <davem@davemloft.net>2016-11-09 20:24:35 -0500
commit6c27f99d35f4d14b7fc5e50ae1f822d7cca6a5af (patch)
tree100d6c2f677020bd7fcebd666cd3e4c2ef853421 /drivers/net/xen-netback
parent1af92836e53f66f8d2cddab2862cc7e1bb3a7cc3 (diff)
downloadlinux-6c27f99d35f4d14b7fc5e50ae1f822d7cca6a5af.tar.bz2
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 <jbeulich@suse.com> Reviewed-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback')
-rw-r--r--drivers/net/xen-netback/xenbus.c12
1 files 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);