[Cbe-oss-dev] [PATCH 18/18] powerpc/spufs: Hold list_mutex while performing a context unbind

[Andre Detsch]

Also, add a related BUG_ON.

Signed-off-by: Andre Detsch <adetsch at br.ibm.com>
---
 arch/powerpc/platforms/cell/spufs/sched.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 3163239..ce110ad 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -566,8 +566,8 @@ static void spu_unschedule(struct spu_gang *gang)
 		BUG_ON(spu->gang != gang);
 		BUG_ON(spu->alloc_state != SPU_USED);
 		node = spu->node;
-		spu_unbind_context(spu, ctx);
 		mutex_lock(&cbe_spu_info[node].list_mutex);
+		spu_unbind_context(spu, ctx);
 		cbe_spu_info[node].nr_active--;
 		spu->alloc_state = SPU_FREE;
 		spu->ctx = NULL;
@@ -1289,6 +1289,7 @@ static int spusched_thread(void *unused)
 					gang = spu->gang;
 					BUG_ON(!gang);
 					ctx = spu->ctx;
+					BUG_ON(!ctx);
 					get_spu_context(ctx);
 					mutex_unlock(mtx);
 					preempted += spusched_tick(gang, ctx,
-- 
1.5.4.3