Only a positive return value indicates success.
Signed-off-by: Jan Beulich <[email protected]>
---
drivers/scsi/xen-scsifront.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- 4.7-rc6-xenbus_scanf.orig/drivers/scsi/xen-scsifront.c
+++ 4.7-rc6-xenbus_scanf/drivers/scsi/xen-scsifront.c
@@ -1000,14 +1000,14 @@ static void scsifront_do_lun_hotplug(str
snprintf(str, sizeof(str), "vscsi-devs/%s/state", dir[i]);
err = xenbus_scanf(XBT_NIL, dev->otherend, str, "%u",
&device_state);
- if (XENBUS_EXIST_ERR(err))
+ if (err <= 0)
continue;
/* virtual SCSI device */
snprintf(str, sizeof(str), "vscsi-devs/%s/v-dev", dir[i]);
err = xenbus_scanf(XBT_NIL, dev->otherend, str,
"%u:%u:%u:%u", &hst, &chn, &tgt, &lun);
- if (XENBUS_EXIST_ERR(err))
+ if (err != 4)
continue;
/*
--
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