commit 852a7cec90f12516eb335bb29ed1398c2f0b7c2c
author Julien Grall <julien.grall@citrix.com> Fri Apr 13 17:33:02 2012 +0000
committer Stefano Stabellini <stefano.stabellini@eu.citrix.com> Fri Apr 13 17:35:06 2012 +0000
tree ed7d924bbea5d8d5e8eec78fa039141f56fcc971
parent 09ab48ee6c7ec082f56f85e234b066ed4fd874e2

xen-mapcache: don't unmap locked entry during mapcache invalidation

When an IOREQ_TYPE_INVALIDATE is sent to QEMU, it invalidates all entry
of the map cache even if it's locked.

QEMU is not able to know that entry was invalidated, so when an IO
access is requested a segfault occured.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

xen-mapcache.c

diff --git a/xen-mapcache.c b/xen-mapcache.c
index 75ac313..59ba085 100644
--- a/xen-mapcache.c
+++ b/xen-mapcache.c
@@ -387,6 +387,9 @@
         if (entry->vaddr_base == NULL) {
             continue;
         }
+        if (entry->lock > 0) {
+            continue;
+        }
 
         if (munmap(entry->vaddr_base, entry->size) != 0) {
             perror("unmap fails");