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-rw-r--r--src/core/transport/chttp2_transport.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 322ff39820..ac399e4a1d 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -876,11 +876,19 @@ static void update_global_window(void *args, gpr_uint32 id, void *stream) {
grpc_chttp2_stream *s = stream;
grpc_chttp2_transport_global *transport_global = &t->global;
grpc_chttp2_stream_global *stream_global = &s->global;
+ int was_zero;
+ int is_zero;
GRPC_CHTTP2_FLOWCTL_TRACE_STREAM("settings", transport_global, stream_global,
outgoing_window,
t->parsing.initial_window_update);
+ was_zero = stream_global->outgoing_window <= 0;
stream_global->outgoing_window += t->parsing.initial_window_update;
+ is_zero = stream_global->outgoing_window <= 0;
+
+ if (was_zero && !is_zero) {
+ grpc_chttp2_list_add_writable_stream(transport_global, stream_global);
+ }
}
static void read_error_locked(grpc_chttp2_transport *t) {