Hi Jeuk,

On 4/12/23 17:50, Philippe Mathieu-Daudé wrote:
On 4/12/23 16:05, Akinobu Mita wrote:
QEMU would not start when trying to create two UFS host controllers and
a UFS logical unit for each with the following options:

-device ufs,id=bus0 \
-device ufs-lu,drive=drive1,bus=bus0,lun=0 \
-device ufs,id=bus1 \
-device ufs-lu,drive=drive2,bus=bus1,lun=0 \

This is because the same ID string ("0:0:0/scsi-disk") is generated
for both UFS logical units.

To fix this issue, prepend the parent pci device's path to make
the ID string unique.
("0000:00:03.0/0:0:0/scsi-disk" and "0000:00:04.0/0:0:0/scsi-disk")

Fixes: 096434fea13a ("hw/ufs: Modify lu.c to share codes with SCSI subsystem")

If you think this must be fixed for the 8.2 release, please assign
a release blocker issues to the GitLab 8.2 milestone here:

Signed-off-by: Akinobu Mita <akinobu.m...@gmail.com>

Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>

  hw/ufs/ufs.c | 8 ++++++++
  1 file changed, 8 insertions(+)

diff --git a/hw/ufs/ufs.c b/hw/ufs/ufs.c
index 68c5f1f6c9..eccdb852a0 100644
--- a/hw/ufs/ufs.c
+++ b/hw/ufs/ufs.c
@@ -1323,9 +1323,17 @@ static bool ufs_bus_check_address(BusState *qbus, DeviceState *qdev,
      return true;
+static char *ufs_bus_get_dev_path(DeviceState *dev)
+    BusState *bus = qdev_get_parent_bus(dev);
+    return qdev_get_dev_path(bus->parent);
  static void ufs_bus_class_init(ObjectClass *class, void *data)
      BusClass *bc = BUS_CLASS(class);
+    bc->get_dev_path = ufs_bus_get_dev_path;
      bc->check_address = ufs_bus_check_address;

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