Only a positive return value indicates success.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
drivers/xen/xen-scsiback.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- 4.7-rc6-xenbus_scanf.orig/drivers/xen/xen-scsiback.c
+++ 4.7-rc6-xenbus_scanf/drivers/xen/xen-scsiback.c
@@ -1071,7 +1071,7 @@ static void scsiback_do_1lun_hotplug(str
/* read status */
snprintf(state, sizeof(state), "vscsi-devs/%s/state", ent);
err = xenbus_scanf(XBT_NIL, dev->nodename, state, "%u", &device_state);
- if (XENBUS_EXIST_ERR(err))
+ if (err <= 0)
return;
/* physical SCSI device */
@@ -1089,7 +1089,7 @@ static void scsiback_do_1lun_hotplug(str
snprintf(str, sizeof(str), "vscsi-devs/%s/v-dev", ent);
err = xenbus_scanf(XBT_NIL, dev->nodename, str, "%u:%u:%u:%u",
&vir.hst, &vir.chn, &vir.tgt, &vir.lun);
- if (XENBUS_EXIST_ERR(err)) {
+ if (err != 4) {
xenbus_printf(XBT_NIL, dev->nodename, state,
"%d", XenbusStateClosed);
return;
--
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