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From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
To: qemu-devel@nongnu.org
Cc: Alex Williamson <alex.williamson@redhat.com>,
=?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>,
Markus Armbruster <armbru@redhat.com>
Subject: [PATCH v2 1/9] util/error: Introduce warn_report_once_err()
Date: Thu, 30 Jan 2025 14:43:38 +0100
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Depending on the configuration, a passthrough device may produce
recurring DMA mapping errors at runtime and produce a lot of
output. It is useful to report only once.
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: C=C3=A9dric Le Goater <clg@redhat.com>
---
include/qapi/error.h | 5 +++++
util/error.c | 9 +++++++++
2 files changed, 14 insertions(+)
diff --git a/include/qapi/error.h b/include/qapi/error.h
index 71f8fb2c50eee9a544992d0c05263c9793956fe1..b6ea274882b9788b64d4bb213c3=
458d7c674a881 100644
--- a/include/qapi/error.h
+++ b/include/qapi/error.h
@@ -448,6 +448,11 @@ void error_free_or_abort(Error **errp);
*/
void warn_report_err(Error *err);
=20
+/*
+ * Convenience function to call warn_report_err() once.
+ */
+void warn_report_once_err(Error *err);
+
/*
* Convenience function to error_report() and free @err.
* The report includes hints added with error_append_hint().
diff --git a/util/error.c b/util/error.c
index e5e247209a9e0796074a9794f5598325f22f8d35..b8a211cccaa609a93091b863161=
44a0ad0a02662 100644
--- a/util/error.c
+++ b/util/error.c
@@ -247,6 +247,15 @@ void warn_report_err(Error *err)
error_free(err);
}
=20
+void warn_report_once_err(Error *err)
+{
+ static bool print_once_;
+ if (!print_once_) {
+ warn_report_err(err);
+ print_once_ =3D true;
+ }
+}
+
void error_reportf_err(Error *err, const char *fmt, ...)
{
va_list ap;
--=20
2.48.1