[Qemu-block] [PATCH] send readcapacity10 when readcapacity16 failed

[Zhu Lingshan]

When play with Dell MD3000 target, for sure it
is a TYPE_DISK, but readcapacity16 would fail.
Then we find that readcapacity10 succeeded. It
looks like the target just support readcapacity10
even through it is a TYPE_DISK or have some
TYPE_ROM characteristics.

This patch can give a chance to send
readcapacity16 when readcapacity10 failed.
This patch is not harmful to original pathes

Signed-off-by: Zhu Lingshan <address@hidden>
---
 block/iscsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/block/iscsi.c b/block/iscsi.c
index bd1f1bf..c8d167f 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1243,8 +1243,9 @@ static void iscsi_readcapacity_sync(IscsiLun *iscsilun, 
Error **errp)
                     iscsilun->lbprz = !!rc16->lbprz;
                     iscsilun->use_16_for_rw = (rc16->returned_lba > 
0xffffffff);
                 }
+                break;
             }
-            break;
+        //fall through to try readcapacity10 instead
         case TYPE_ROM:
             task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 
0, 0);
             if (task != NULL && task->status == SCSI_STATUS_GOOD) {
-- 
2.6.2