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From de651299014ae67b110a2abbff4a9e544b215b2b Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Wed, 6 Nov 2013 14:41:21 +0100
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Subject: [PATCH 45/81] qdev: Do not let the user try to device_add when it cannot work
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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Message-id: <1383748882-22831-17-git-send-email-kwolf@redhat.com>
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Patchwork-id: 55542
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O-Subject: [RHEL-7.0 qemu-kvm PATCH v2 16/17] qdev: Do not let the user try to device_add when it cannot work
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Bugzilla: 1001216
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RH-Acked-by: Marcel Apfelbaum <marcel.a@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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From: Markus Armbruster <armbru@redhat.com>
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Such devices have always been unavailable and omitted from the list of
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available devices shown by device_add help. Until commit 18b6dad
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silently broke the former, setting up nasty traps for unwary users,
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like this one:
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$ qemu-system-x86_64 -nodefaults -monitor stdio -display none
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QEMU 1.6.50 monitor - type 'help' for more information
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(qemu) device_add apic
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Segmentation fault (core dumped)
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I call that a regression. Fix it.
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(cherry picked from pending upstream submission)
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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---
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qdev-monitor.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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qdev-monitor.c | 6 +++---
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1 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/qdev-monitor.c b/qdev-monitor.c
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index f54cb21..39d030b 100644
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--- a/qdev-monitor.c
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+++ b/qdev-monitor.c
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@@ -477,13 +477,13 @@ DeviceState *qdev_device_add(QemuOpts *opts)
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}
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}
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- if (!obj) {
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+ k = DEVICE_CLASS(obj);
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+
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+ if (!k || k->cannot_instantiate_with_device_add_yet) {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
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return NULL;
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}
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- k = DEVICE_CLASS(obj);
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-
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/* find bus */
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path = qemu_opt_get(opts, "bus");
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if (path != NULL) {
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--
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1.7.1
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