[PATCH] xenbus: prefer xenbus_scanf() over xenbus_gather()

From	"Jan Beulich" <JBeulich@suse.com>
Newsgroups	linux.kernel
Subject	[PATCH] xenbus: prefer xenbus_scanf() over xenbus_gather()
Date	2016-07-07 10:10 +0200
Message-ID	<rScxH-4ic-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Show all headers | View raw

... for single items being collected: It is more typesafe (as the
compiler can check format string and to-be-written-to variable match)
and requires one less parameter to be passed.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
---
 drivers/xen/xenbus/xenbus_client.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- 4.7-rc6-prefer-xenbus_scanf.orig/drivers/xen/xenbus/xenbus_client.c
+++ 4.7-rc6-prefer-xenbus_scanf/drivers/xen/xenbus/xenbus_client.c
@@ -926,9 +926,9 @@ EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
  */
 enum xenbus_state xenbus_read_driver_state(const char *path)
 {
-	enum xenbus_state result;
-	int err = xenbus_gather(XBT_NIL, path, "state", "%d", &result, NULL);
-	if (err)
+	int result;
+
+	if (xenbus_scanf(XBT_NIL, path, "state", "%d", &result) != 1)
 		result = XenbusStateUnknown;
 
 	return result;

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH] xenbus: prefer xenbus_scanf() over xenbus_gather() "Jan Beulich" <JBeulich@suse.com> - 2016-07-07 10:10 +0200

csiph-web