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| author | Milan Zamazal <mzamazal@redhat.com> | 2023-07-20 12:10:37 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-08-03 16:06:49 -0400 |
| commit | 63a3520e29a1a68d8610315b049ccb5840fe22e9 (patch) | |
| tree | 84cec39aaa84055db6ab712db7b8be780ab99f44 /include | |
| parent | 1084feddc6a677cdfdde56936bfb97cf32cc4dee (diff) | |
| download | qemu-63a3520e29a1a68d8610315b049ccb5840fe22e9.zip qemu-63a3520e29a1a68d8610315b049ccb5840fe22e9.tar.gz qemu-63a3520e29a1a68d8610315b049ccb5840fe22e9.tar.bz2 | |
hw/virtio: Add a protection against duplicate vu_scmi_stop calls
The QEMU CI fails in virtio-scmi test occasionally. As reported by
Thomas Huth, this happens most likely when the system is loaded and it
fails with the following error:
qemu-system-aarch64: ../../devel/qemu/hw/pci/msix.c:659:
msix_unset_vector_notifiers: Assertion `dev->msix_vector_use_notifier && dev->msix_vector_release_notifier' failed.
../../devel/qemu/tests/qtest/libqtest.c:200: kill_qemu() detected QEMU death from signal 6 (Aborted) (core dumped)
As discovered by Fabiano Rosas, the cause is a duplicate invocation of
msix_unset_vector_notifiers via duplicate vu_scmi_stop calls:
msix_unset_vector_notifiers
virtio_pci_set_guest_notifiers
vu_scmi_stop
vu_scmi_disconnect
...
qemu_chr_write_buffer
msix_unset_vector_notifiers
virtio_pci_set_guest_notifiers
vu_scmi_stop
vu_scmi_set_status
...
qemu_cleanup
While vu_scmi_stop calls are protected by vhost_dev_is_started()
check, it's apparently not enough. vhost-user-blk and vhost-user-gpio
use an extra protection, see f5b22d06fb (vhost: recheck dev state in
the vhost_migration_log routine) for the motivation. Let's use the
same in vhost-user-scmi, which fixes the failure above.
Fixes: a5dab090e142 ("hw/virtio: Add boilerplate for vhost-user-scmi device")
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Message-Id: <20230720101037.2161450-1-mzamazal@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/virtio/vhost-user-scmi.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/virtio/vhost-user-scmi.h b/include/hw/virtio/vhost-user-scmi.h index 6175a74..c90db77 100644 --- a/include/hw/virtio/vhost-user-scmi.h +++ b/include/hw/virtio/vhost-user-scmi.h @@ -25,6 +25,7 @@ struct VHostUserSCMI { VirtQueue *cmd_vq; VirtQueue *event_vq; bool connected; + bool started_vu; }; #endif /* _QEMU_VHOST_USER_SCMI_H */ |