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virtio: Fix error handling in virtio_bus_device_plugged 

For one thing we shouldn't continue if an error happened, for the other
two steps failing can cause an abort() in error_setg because we reuse
the same errp blindly.

Add error handling checks to fix both issues.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Fam Zheng 2017-03-17 20:32:42 +08:00 committed by Michael S. Tsirkin
parent 55a19ad8b2
commit a77690c41d
1 changed files with 17 additions and 3 deletions
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20
hw/virtio/virtio-bus.c
View File

@ -25,6 +25,7 @@
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/qdev.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio.h"
@ -48,20 +49,33 @@ void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
bool has_iommu = virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
Error *local_err = NULL;
DPRINTF("%s: plug device.\n", qbus->name);
if (klass->pre_plugged != NULL) {
klass->pre_plugged(qbus->parent, errp);
klass->pre_plugged(qbus->parent, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
/* Get the features of the plugged device. */
assert(vdc->get_features != NULL);
vdev->host_features = vdc->get_features(vdev, vdev->host_features,
errp);
&local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (klass->device_plugged != NULL) {
klass->device_plugged(qbus->parent, errp);
klass->device_plugged(qbus->parent, &local_err);
}
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (klass->get_dma_as != NULL && has_iommu) {