Only a positive return value indicates success.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
---
drivers/xen/manage.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 4.7-rc6-xenbus_scanf.orig/drivers/xen/manage.c
+++ 4.7-rc6-xenbus_scanf/drivers/xen/manage.c
@@ -275,7 +275,7 @@ static void sysrq_handler(struct xenbus_
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;
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