Clock canonical name is set in device_set_realized (see the block
added to hw/core/qdev.c in commit 0e6934f264).
If we connect a clock after the device is realized, this code is
not executed. This is currently not a problem as this name is only
used for trace events, however this disrupt tracing.
Add a comment to document qdev_connect_clock_in() must be called
before the device is realized, and assert this condition.
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
include/hw/qdev-clock.h | 2 ++
hw/core/qdev-clock.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/include/hw/qdev-clock.h b/include/hw/qdev-clock.h
index a897f7c9d0..64ca4d266f 100644
--- a/include/hw/qdev-clock.h
+++ b/include/hw/qdev-clock.h
@@ -70,6 +70,8 @@ Clock *qdev_get_clock_out(DeviceState *dev, const char *name);
*
* Set the source clock of input clock @name of device @dev to @source.
* @source period update will be propagated to @name clock.
+ *
+ * Must be called before @dev is realized.
*/
void qdev_connect_clock_in(DeviceState *dev, const char *name, Clock *source);
diff --git a/hw/core/qdev-clock.c b/hw/core/qdev-clock.c
index f139b68b88..47ecb5b4fa 100644
--- a/hw/core/qdev-clock.c
+++ b/hw/core/qdev-clock.c
@@ -186,5 +186,6 @@ Clock *qdev_alias_clock(DeviceState *dev, const char *name,
void qdev_connect_clock_in(DeviceState *dev, const char *name, Clock *source)
{
+ assert(!dev->realized);
clock_set_source(qdev_get_clock_in(dev, name), source);
}
--
2.21.3
