Changeset 74c0de0 in mainline

Timestamp:

2017-12-21T13:49:38Z (6 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ff16da5f

Parents:

f543804

git-author:

Ondřej Hlavatý <aearsis@…> (2017-12-21 13:49:25)

git-committer:

Ondřej Hlavatý <aearsis@…> (2017-12-21 13:49:38)

Message:

xhci: add memory barrier to event ring

File:

• uspace/drv/bus/usb/xhci/trb_ring.c (modified) (2 diffs)

uspace/drv/bus/usb/xhci/trb_ring.c

@@ -32 +32 @@
 #include <as.h>
 #include <align.h>
+#include <libarch/barrier.h>
 #include <usb/debug.h>
 #include "hw_struct/trb.h"
@@ -328 +329 @@
         }
 
+        /* Do not reorder the Cycle bit reading with memcpy */
+        read_barrier();
+
         memcpy(event, ring->dequeue_trb, sizeof(xhci_trb_t));