From fccb7c2ccec7fe9a831be04e589b5fb56a048828 Mon Sep 17 00:00:00 2001
From: xuyinghao <xuyinghao2@huawei.com>
Date: Tue, 9 Aug 2022 18:58:05 +0800
Subject: [PATCH 13/22] qemu_cgroup: Drop ENOENT special case for RNG devices

Description: When allowing or denying RNG device in CGroups there's a special check if the backend device exists (errno == ENOENT) in which case success is returned to caller. This is in contrast with the rest of the functions and in fact wrong too - if the backend device doesn't exist then QEMU will fail opening it. Might as well signal error here.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
---
 src/qemu/qemu_cgroup.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index aa721df100..c30ede7394 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -667,9 +667,9 @@ qemuSetupRNGCgroup(virDomainObjPtr vm,
         virDomainAuditCgroupPath(vm, priv->cgroup, "allow",
                                  rng->source.file,
                                  "rw", rv);
-        if (rv < 0 &&
-            !virLastErrorIsSystemErrno(ENOENT))
+        if (rv < 0) {
             return -1;
+        }
     }
 
     return 0;
@@ -694,9 +694,9 @@ qemuTeardownRNGCgroup(virDomainObjPtr vm,
         virDomainAuditCgroupPath(vm, priv->cgroup, "deny",
                                  rng->source.file,
                                  "rw", rv);
-        if (rv < 0 &&
-            !virLastErrorIsSystemErrno(ENOENT))
+        if (rv < 0) {
             return -1;
+        }
     }
 
     return 0;
-- 
2.33.0