[PATCH v4 26/31] QOM: Fix error_append_hint/error_prepend usage

[Vladimir Sementsov-Ogievskiy]

If we want to add some info to errp (by error_prepend() or
error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro.
Otherwise, this info will not be added when errp == &fatal_err
(the program will exit prior to the error_append_hint() or
error_prepend() call).  Fix such cases.

This commit (together with its neighbors) was generated by

git grep -l 'error_\(append_hint\|prepend\)(errp' | while read f; do \
spatch --sp-file scripts/coccinelle/fix-error-add-info.cocci \
--in-place $f; done

and then

./python/commit-per-subsystem.py MAINTAINERS "$(< auto-msg)"

(auto-msg was a file with this commit message)

and then by hand, for not maintained changed files:

git commit -m "<SUB-SYSTEM>: $(< auto-msg)" <FILES>

Still, for backporting it may be more comfortable to use only the first
command and then do one huge commit.

Reported-by: Greg Kurz <gr...@kaod.org>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
---
 hw/core/qdev-properties-system.c | 1 +
 qdev-monitor.c                   | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index 70bfd4809b..497a568cc2 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -221,6 +221,7 @@ static void get_chr(Object *obj, Visitor *v, const char 
*name, void *opaque,
 static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque,
                     Error **errp)
 {
+    ERRP_AUTO_PROPAGATE();
     DeviceState *dev = DEVICE(obj);
     Error *local_err = NULL;
     Property *prop = opaque;
diff --git a/qdev-monitor.c b/qdev-monitor.c
index 148df9cacf..89c99d9753 100644
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -328,6 +328,7 @@ static Object *qdev_get_peripheral_anon(void)
 
 static void qbus_list_bus(DeviceState *dev, Error **errp)
 {
+    ERRP_AUTO_PROPAGATE();
     BusState *child;
     const char *sep = " ";
 
@@ -342,6 +343,7 @@ static void qbus_list_bus(DeviceState *dev, Error **errp)
 
 static void qbus_list_dev(BusState *bus, Error **errp)
 {
+    ERRP_AUTO_PROPAGATE();
     BusChild *kid;
     const char *sep = " ";
 
-- 
2.21.0