[PATCH v1] memory: remove assert to avoid unnecessary coredump

[Yi Sun <yi.y.sun@linux.intel.com>]

It is too strict to use assert to make qemu coredump if
the notification does not overlap with registered range.
Skip it is fine enough.

During test, we found such a case for vhost net device:
    memory_region_notify_one: entry->iova=0xfee00000, entry_end=0xfeffffff, notifier->start=0xfef00000, notifier->end=0xffffffffffffffff

Skip this notification but not coredump makes everything
work well.

Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
---
 memory.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/memory.c b/memory.c
index 06484c2bff..62ad0f3377 100644
--- a/memory.c
+++ b/memory.c
@@ -1921,12 +1921,11 @@ void memory_region_notify_one(IOMMUNotifier *notifier,
      * Skip the notification if the notification does not overlap
      * with registered range.
      */
-    if (notifier->start > entry_end || notifier->end < entry->iova) {
+    if (notifier->start > entry_end || notifier->end < entry->iova ||
+        entry->iova < notifier->start || entry_end > notifier->end) {
         return;
     }
 
-    assert(entry->iova >= notifier->start && entry_end <= notifier->end);
-
     if (entry->perm & IOMMU_RW) {
         request_flags = IOMMU_NOTIFIER_MAP;
     } else {
-- 
2.15.1