lkml.org 
[lkml]   [2017]   [Oct]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH review for 4.4 15/24] xen/manage: correct return value check on xenbus_scanf()
Date
From: Jan Beulich <JBeulich@suse.com>

[ Upstream commit 4fed1b125eb6252bde478665fc05d4819f774fa8 ]

A negative return value indicates an error; in fact the function at
present won't ever return zero.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
---
drivers/xen/manage.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index e12bd3635f83..e8850b0e3272 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -275,7 +275,7 @@ static void sysrq_handler(struct xenbus_watch *watch, const char **vec,
err = xenbus_transaction_start(&xbt);
if (err)
return;
- if (!xenbus_scanf(xbt, "control", "sysrq", "%c", &sysrq_key)) {
+ if (xenbus_scanf(xbt, "control", "sysrq", "%c", &sysrq_key) < 0) {
pr_err("Unable to read sysrq code in control/sysrq\n");
xenbus_transaction_end(xbt, 1);
return;
--
2.11.0
\
 
 \ /
  Last update: 2017-10-08 00:39    [W:0.252 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site