[PATCH V1 2/4] pflash: fix cpr

[Steve Sistare <steven.sistare@oracle.com>]

During normal migration, new QEMU creates and initializes memory regions,
then loads the preserved contents of the region from vmstate.

During CPR, memory regions are preserved in place, then the realize
method initializes the regions contents, losing the old contents.  To
fix, skip the re-init during CPR.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 hw/block/block.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/block/block.c b/hw/block/block.c
index 1d405e0..2e10611 100644
--- a/hw/block/block.c
+++ b/hw/block/block.c
@@ -12,6 +12,7 @@
 #include "system/blockdev.h"
 #include "system/block-backend.h"
 #include "hw/block/block.h"
+#include "migration/cpr.h"
 #include "qapi/error.h"
 #include "qapi/qapi-types-block.h"
 
@@ -66,6 +67,10 @@ bool blk_check_size_and_read_all(BlockBackend *blk, DeviceState *dev,
     int ret;
     g_autofree char *dev_id = NULL;
 
+    if (cpr_is_incoming()) {
+        return true;
+    }
+
     blk_len = blk_getlength(blk);
     if (blk_len < 0) {
         error_setg_errno(errp, -blk_len,
-- 
1.8.3.1