[Qemu-devel] [PATCH for-2.11 v3 1/3] hw/ppc/spapr_drc.c: change spapr_drc_needed to use drc->dev

[Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>]

This patch makes a small fix in 'spapr_drc_needed' to change how we detect
if a DRC has a device attached. Previously it used dr_entity_sense for this,
which  works for physical DRCs.

However, for logical DRCs, it didn't cover the case where a logical DRC has
a drc->dev but the state is LOGICAL_UNUSABLE (e.g. a hotplugged CPU before
CAS). In this case, the dr_entity_sense of this DRC returns UNUSABLE and the
code was considering that there were no dev attached, making spapr_drc_needed
return 'false' when in fact we would like to migrate the DRC.

Changing it to check for drc->dev instead works for all DRC types.

Signed-off-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
---
 hw/ppc/spapr_drc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 6541a52..6670a76 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -464,10 +464,9 @@ static bool spapr_drc_needed(void *opaque)
 {
     sPAPRDRConnector *drc = (sPAPRDRConnector *)opaque;
     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
-    sPAPRDREntitySense value = drck->dr_entity_sense(drc);
 
     /* If no dev is plugged in there is no need to migrate the DRC state */
-    if (value != SPAPR_DR_ENTITY_SENSE_PRESENT) {
+    if (!drc->dev) {
         return false;
     }
 
-- 
2.9.4