[PATCH 2/3] qemu_hotplug: Report better error message for platform serial devices

[Martin Kletzander <mkletzan@xxxxxxxxxx>]

This should be better than the current for both hotplug:

    error: internal error: Invalid target model for serial device

and hot-unplug:

    error: An error occurred, but the cause is unknown

which should not be reached at all.

Resolves: https://issues.redhat.com/browse/RHEL-66222
Resolves: https://issues.redhat.com/browse/RHEL-66223
Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
---
 src/qemu/qemu_hotplug.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 1a7b69e5bb44..f856e26c1877 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2063,6 +2063,12 @@ qemuDomainAttachChrDevice(virQEMUDriver *driver,
     bool need_release = false;
     bool guestfwd = false;
 
+    if (qemuChrIsPlatformDevice(vmdef, chr)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("Cannot hotplug platform device"));
+        return -1;
+    }
+
     if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL) {
         guestfwd = chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_GUESTFWD;
 
@@ -6049,6 +6055,12 @@ qemuDomainDetachDeviceChr(virQEMUDriver *driver,
         goto cleanup;
     }
 
+    if (qemuChrIsPlatformDevice(vmdef, tmpChr)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("Cannot detach platform device"));
+        return -1;
+    }
+
     if (vmdef->os.type == VIR_DOMAIN_OSTYPE_HVM &&
         tmpChr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
         (tmpChr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL ||
-- 
2.47.0