1 files changed, 11 insertions, 1 deletions

diff --git a/kernel/relay.c b/kernel/relay.c
index 04006ef970b8..8d13a7855c08 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -944,6 +944,10 @@ static void relay_file_read_consume(struct rchan_buf *buf,
         size_t n_subbufs = buf->chan->n_subbufs;
         size_t read_subbuf;
 
+        if (buf->subbufs_produced == buf->subbufs_consumed &&
+            buf->offset == buf->bytes_consumed)
+                return;
+
         if (buf->bytes_consumed + bytes_consumed > subbuf_size) {
                 relay_subbufs_consumed(buf->chan, buf->cpu, 1);
                 buf->bytes_consumed = 0;
@@ -975,6 +979,8 @@ static int relay_file_read_avail(struct rchan_buf *buf, size_t read_pos)
 
         relay_file_read_consume(buf, read_pos, 0);
 
+        consumed = buf->subbufs_consumed;
+
         if (unlikely(buf->offset > subbuf_size)) {
                 if (produced == consumed)
                         return 0;
@@ -993,8 +999,12 @@ static int relay_file_read_avail(struct rchan_buf *buf, size_t read_pos)
         if (consumed > produced)
                 produced += n_subbufs * subbuf_size;
 
-        if (consumed == produced)
+        if (consumed == produced) {
+                if (buf->offset == subbuf_size &&
+                    buf->subbufs_produced > buf->subbufs_consumed)
+                        return 1;
                 return 0;
+        }
 
         return 1;
 }