[PATCH v3 06/13] net/slirp: Clean up error reporting

[Markus Armbruster <armbru@redhat.com>]

net_slirp_register_poll_sock() and net_slirp_unregister_poll_sock()
report WSAEventSelect() failure with error_setg(&error_warn, ...).
error_setg_win32(&error_warn, ...) is undesirable just like
error_setg(&error_fatal, ...) and error_setg(&error_abort, ...)  are.
Replace by warn_report().

The failures should probably be errors, but these functions implement
callbacks that cannot fail, exit(1) would be too harsh, and silent
failure we don't want.  Thus, warnings.

Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 net/slirp.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/net/slirp.c b/net/slirp.c
index 9657e86a84..0a1c2a5eac 100644
--- a/net/slirp.c
+++ b/net/slirp.c
@@ -258,11 +258,13 @@ static void net_slirp_register_poll_sock(slirp_os_socket fd, void *opaque)
 {
 #ifdef WIN32
     AioContext *ctxt = qemu_get_aio_context();
+    g_autofree char *msg = NULL;
 
     if (WSAEventSelect(fd, event_notifier_get_handle(&ctxt->notifier),
                        FD_READ | FD_ACCEPT | FD_CLOSE |
                        FD_CONNECT | FD_WRITE | FD_OOB) != 0) {
-        error_setg_win32(&error_warn, WSAGetLastError(), "failed to WSAEventSelect()");
+        msg = g_win32_error_message(WSAGetLastError());
+        warn_report("failed to WSAEventSelect(): %s", msg);
     }
 #endif
 }
@@ -270,8 +272,11 @@ static void net_slirp_register_poll_sock(slirp_os_socket fd, void *opaque)
 static void net_slirp_unregister_poll_sock(slirp_os_socket fd, void *opaque)
 {
 #ifdef WIN32
+    g_autofree char *msg = NULL;
+
     if (WSAEventSelect(fd, NULL, 0) != 0) {
-        error_setg_win32(&error_warn, WSAGetLastError(), "failed to WSAEventSelect()");
+        msg = g_win32_error_message(WSAGetLastError());
+        warn_report("failed to WSAEventSelect(): %s", msg);
     }
 #endif
 }
-- 
2.49.0