pci: Make query-pci stub consistent with the real one

QMP query-pci and HMP info pci can behave differently when there are
no PCI devices.  They can report nothing, like this:

    qemu-system-aarch64 -S -M spitz -display none -monitor stdio
    QEMU 7.1.91 monitor - type 'help' for more information
    (qemu) info pci

Or they can fail, like this:

    qemu-system-microblaze -M petalogix-s3adsp1800 -display none -monitor stdio
    QEMU 7.1.91 monitor - type 'help' for more information
    (qemu) info pci
    PCI devices not supported

They fail when none of the target's machines supports PCI, i.e. when
we're using qmp_query_pci() from hw/pci/pci-stub.c.

The error is not useful, and reporting nothing makes sense, so do that
in pci-stub.c, too.

Now qmp_query_pci() can't fail anymore.  Drop the dead error handling
from hmp_info_pci().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20221201121133.3813857-5-armbru@redhat.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/hw/pci/pci-hmp-cmds.c b/hw/pci/pci-hmp-cmds.c
index e5e07ea72c..f8d67bbb09 100644
--- a/hw/pci/pci-hmp-cmds.c
+++ b/hw/pci/pci-hmp-cmds.c
@@ -105,14 +105,8 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
 void hmp_info_pci(Monitor *mon, const QDict *qdict)
 {
     PciInfoList *info_list, *info;
-    Error *err = NULL;
 
-    info_list = qmp_query_pci(&err);
-    if (err) {
-        monitor_printf(mon, "PCI devices not supported\n");
-        error_free(err);
-        return;
-    }
+    info_list = qmp_query_pci(&error_abort);
 
     for (info = info_list; info; info = info->next) {
         PciDeviceInfoList *dev;