diff options
| author | Jan Beulich <JBeulich@suse.com> | 2017-10-07 22:36:53 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-08 10:08:35 +0100 |
| commit | b469d5c393c24a3b1edb3c88e61d2d8c1bc0a38a (patch) | |
| tree | 61e5bd679590dd9600db2d89a877e9fa34781d5c /drivers/xen | |
| parent | b1a38567a9ed04d0c235023d5b2a70cce1a3bc4c (diff) | |
xen/manage: correct return value check on xenbus_scanf()
[ 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/manage.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 26e5e8507f03..357a8db859c9 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -277,7 +277,7 @@ 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; |