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[PULL 3/5] spapr: Assert DIMM unplug state in spapr_memory_unplug()

From: David Gibson
Subject: [PULL 3/5] spapr: Assert DIMM unplug state in spapr_memory_unplug()
Date: Wed, 31 Mar 2021 17:25:22 +1100

From: Greg Kurz <groug@kaod.org>

spapr_memory_unplug() is the last step of the hot unplug sequence.
It is indirectly called by:


and spapr_lmb_release() already buys us that DIMM unplug state is
present : it gets restored with spapr_recover_pending_dimm_state()
if missing.

g_assert() that spapr_pending_dimm_unplugs_find() cannot return NULL
in spapr_memory_unplug() to make this clear and silence Coverity.

Fixes: Coverity CID 1450767
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <161562021166.948373.15092876234470478331.stgit@bahia.lan>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
 hw/ppc/spapr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index d56418ca29..73a06df3b1 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -3660,6 +3660,9 @@ static void spapr_memory_unplug(HotplugHandler 
*hotplug_dev, DeviceState *dev)
     SpaprMachineState *spapr = SPAPR_MACHINE(hotplug_dev);
     SpaprDimmState *ds = spapr_pending_dimm_unplugs_find(spapr, PC_DIMM(dev));
+    /* We really shouldn't get this far without anything to unplug */
+    g_assert(ds);
     pc_dimm_unplug(PC_DIMM(dev), MACHINE(hotplug_dev));
     spapr_pending_dimm_unplugs_remove(spapr, ds);

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