The Independent JPEG Group's JPEG software v5a
diff --git a/jdatasrc.c b/jdatasrc.c
index a37bdd2..8c4ac0b 100644
--- a/jdatasrc.c
+++ b/jdatasrc.c
@@ -137,6 +137,9 @@
     while (num_bytes > (long) src->pub.bytes_in_buffer) {
       num_bytes -= (long) src->pub.bytes_in_buffer;
       (void) fill_input_buffer(cinfo);
+      /* note we assume that fill_input_buffer will never return FALSE,
+       * so suspension need not be handled.
+       */
     }
     src->pub.next_input_byte += (size_t) num_bytes;
     src->pub.bytes_in_buffer -= (size_t) num_bytes;