ipcpd: Avoid unnecessary copy in eth reader

This reads from the Ethernet device directly into the rdrbuff to avoid
a copy on the read side in the Ethernet IPCPs. This does not work for
the netmap device.

Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be>
Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/shm_rdrbuff.c b/src/lib/shm_rdrbuff.c
index 6e3dbca4..12e29bef 100644
--- a/src/lib/shm_rdrbuff.c
+++ b/src/lib/shm_rdrbuff.c
@@ -652,5 +652,5 @@ void shm_du_buff_truncate(struct shm_du_buff * sdb,
         assert(sdb);
         assert(len <= sdb->size);
 
-        sdb->du_tail -= sdb->size - len;
+        sdb->du_tail = sdb->du_head + len;
 }