Commit
a818a4b changed scsi_bus_legacy_handle_cmdline() to report
errors from scsi_bus_legacy_add_drive() with error_report() in
addition to returning them. That's inappropriate.
Two kinds of callers:
1. realize methods (devices "esp", "virtio-scsi-device" and
"spapr-vscsi")
The error object gets passed up the call chain until it gets
reported again and freed.
Example:
$ qemu-system-arm -M virt -S -display none \
> -drive if=scsi,id=foo,bus=1,file=tmp.qcow2 \
> -device nec-usb-xhci -device usb-storage,drive=foo \
> -device virtio-scsi-pci
qemu-system-arm: -drive if=scsi,id=foo,bus=1,file=tmp.qcow2: Property 'scsi-disk.drive' can't take value 'foo', it's in use
qemu-system-arm: -drive if=scsi,id=foo,bus=1,file=tmp.qcow2: Setting drive property failed
qemu-system-arm: -device virtio-scsi-pci: Setting drive property failed
qemu-system-arm: -device virtio-scsi-pci: Device initialization failed
qemu-system-arm: -device virtio-scsi-pci: Device 'virtio-scsi-pci' could not be initialized
The second message in this error cascade comes from
scsi_bus_legacy_handle_cmdline(). The error object then gets
passed up to the qdev_init() called from
virtio_scsi_pci_init_pci(), which reports it again.
2. init methods (devices "am53c974", "dc390", "lsi53c895a",
"lsi53c810", "megasas", "megasas-gen2")
init methods need to report their errors with qerror_report().
These don't. The inappropriate error_report() papers over the bug.
error_report() isn't the same as qerror_report() in QMP context,
but this can't actually happen: QMP can still only hot-plug, and
callers call scsi_bus_legacy_handle_cmdline() only on cold-plug.
Except for sysbus_esp_realize(), but that can't be hot-plugged at
all, as far as I can tell.
Fix the init methods and drop the inappropriate error_report() in
scsi_bus_legacy_handle_cmdline().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-Id: <
1425925048-15482-2-git-send-email-armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
#include "hw/scsi/esp.h"
#include "trace.h"
#include "qemu/log.h"
+#include "qapi/qmp/qerror.h"
#define TYPE_AM53C974_DEVICE "am53c974"
if (!d->hotplugged) {
scsi_bus_legacy_handle_cmdline(&s->bus, &err);
if (err != NULL) {
+ qerror_report_err(err);
error_free(err);
return -1;
}
#include "hw/pci/pci.h"
#include "hw/scsi/scsi.h"
#include "sysemu/dma.h"
-#include "qemu/error-report.h"
+#include "qapi/qmp/qerror.h"
//#define DEBUG_LSI
//#define DEBUG_LSI_REG
if (!d->hotplugged) {
scsi_bus_legacy_handle_cmdline(&s->bus, &err);
if (err != NULL) {
+ qerror_report_err(err);
error_free(err);
return -1;
}
#include "hw/scsi/scsi.h"
#include "block/scsi.h"
#include "trace.h"
+#include "qapi/qmp/qerror.h"
#include "mfi.h"
if (!d->hotplugged) {
scsi_bus_legacy_handle_cmdline(&s->bus, &err);
if (err != NULL) {
+ qerror_report_err(err);
error_free(err);
return -1;
}
scsi_bus_legacy_add_drive(bus, blk_by_legacy_dinfo(dinfo),
unit, false, -1, NULL, &err);
if (err != NULL) {
- error_report("%s", error_get_pretty(err));
error_propagate(errp, err);
break;
}