ustream: suppress write attempts in ustream_printf and ustream_vprintf if a write error was flagged

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/ustream.c b/ustream.c
index 8e6efcd..9c14678 100644
--- a/ustream.c
+++ b/ustream.c
@@ -435,6 +435,9 @@ int ustream_vprintf(struct ustream *s, const char *format, va_list arg)
 	va_list arg2;
 	int wr, maxlen, buflen;
 
+	if (s->write_error)
+		return 0;
+
 	if (!l->data_bytes) {
 		buf = alloca(MAX_STACK_BUFLEN);
 		va_copy(arg2, arg);
@@ -493,6 +496,9 @@ int ustream_printf(struct ustream *s, const char *format, ...)
 	va_list arg;
 	int ret;
 
+	if (s->write_error)
+		return 0;
+
 	va_start(arg, format);
 	ret = ustream_vprintf(s, format, arg);
 	va_end(arg);