From eff17c61ba358d03461b62c95ef593e3b8d65e26 Mon Sep 17 00:00:00 2001
From: Coiby Xu <coxu@redhat.com>
Date: Wed, 14 Jul 2021 15:26:10 +0800
Subject: [PATCH] fix(qeth_rules): check the existence of
 /sys/devices/qeth/*/online beforehand

On s390x KVM machines, the follow errors occurred,
    $ kdumpctl rebuild
    kdump: Rebuilding /boot/initramfs-4.18.0-321.el8.s390xkdump.img
    /usr/lib/dracut/modules.d/95qeth_rules/module-setup.sh: line 13: /sys/devices/qeth/*/online: No such file or directory
    /usr/lib/dracut/modules.d/95qeth_rules/module-setup.sh: line 13: /sys/devices/qeth/*/online: No such file or directory

because s390x KVM uses virtual devices and /sys/devices/qeth/*/online
doesn't exist. Eliminate this error by checking the existence
beforehand.

(cherry picked from commit 6c71ba4121ae64ccd13fefba68ca327ac623810f)

Resolves: #2050570
---
 modules.d/95qeth_rules/module-setup.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules.d/95qeth_rules/module-setup.sh b/modules.d/95qeth_rules/module-setup.sh
index 914a28ce..884ae072 100755
--- a/modules.d/95qeth_rules/module-setup.sh
+++ b/modules.d/95qeth_rules/module-setup.sh
@@ -10,6 +10,7 @@ check() {
 
     [[ $hostonly ]] && {
         for i in /sys/devices/qeth/*/online; do
+            [ ! -f "$i" ] && continue
             read -r _online < "$i"
             [ "$_online" -eq 1 ] && return 0
         done