ide/atapi: Track tray locked state

We already track it in BlockDriverState.  Just like tray open/close
state, we should track it in the device models instead, because it's
device state.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

hw/ide/atapi.c

diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c
index 0943f66..d9db6de 100644
--- a/hw/ide/atapi.c
+++ b/hw/ide/atapi.c
@@ -788,8 +788,9 @@
             buf[12] = 0x71;
             buf[13] = 3 << 5;
             buf[14] = (1 << 0) | (1 << 3) | (1 << 5);
-            if (bdrv_is_locked(s->bs))
+            if (s->tray_locked) {
                 buf[6] |= 1 << 1;
+            }
             buf[15] = 0x00;
             cpu_to_ube16(&buf[16], 706);
             buf[18] = 0;
@@ -831,6 +832,7 @@
 
 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf)
 {
+    s->tray_locked = buf[4] & 1;
     bdrv_set_locked(s->bs, buf[4] & 1);
     ide_atapi_cmd_ok(s);
 }

hw/ide/internal.h

diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index 8a9052e..663db39 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -443,6 +443,7 @@
     uint8_t sense_key;
     uint8_t asc;
     bool tray_open;
+    bool tray_locked;
     uint8_t cdrom_changed;
     int packet_transfer_size;
     int elementary_transfer_size;