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pflash: fix cpr

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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>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Message-ID: <1741380954-341079-3-git-send-email-steven.sistare@oracle.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Steve Sistare 2025-03-07 12:55:52 -08:00 • committed by Fabiano Rosas
parent 1632a2017f
commit e56ba1878f
1 changed files with 5 additions and 0 deletions
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5
hw/block/block.c
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@ -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,