From: Sam Bobroff <sam.bobroff@au1.ibm.com>
Date: Tue, 1 Sep 2015 01:23:47 +0000 (+1000)
Subject: spapr: Make ibm, change-msi respect 3 return values
X-Git-Tag: TizenStudio_2.0_p2.3.2~120^2~1^2~170^2~31
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b359bd6a424b8de7db994d7120e87a7465b69337;p=sdk%2Femulator%2Fqemu.git

spapr: Make ibm, change-msi respect 3 return values

Currently, rtas_ibm_change_msi() always returns four values even if
less are specified.

Correct this by only returning the fourth parameter if it was
requested.

This is specified by PAPR.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---

diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index a2feb4c..6782fd0 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -375,7 +375,9 @@ out:
     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
     rtas_st(rets, 1, req_num);
     rtas_st(rets, 2, ++seq_num);
-    rtas_st(rets, 3, ret_intr_type);
+    if (nret > 3) {
+        rtas_st(rets, 3, ret_intr_type);
+    }
 
     trace_spapr_pci_rtas_ibm_change_msi(config_addr, func, req_num, irq);
 }