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authorJeremy Kerr <jk@ozlabs.org>2008-03-25 13:32:03 +1100
committerJeremy Kerr <jk@ozlabs.org>2008-03-28 14:36:01 +1100
commit4eb5aef583aab29dc125b6c2feb0b31f2e350c45 (patch)
treef5b7f31574938b89f88cedfcb64f9102a851b9fb /arch/powerpc/platforms/cell
parentaf8b44e01b4e5a94cb665f6b958f5a5bc4025b0e (diff)
[POWERPC] spufs: reacquire LS pointer in spu_process_callback
During spu_process callback, we release then acquire the SPU, but keep a pointer to the local store memory. Since the context may have been scheduled out during the callback, the ls pointer may become invalid. This change reacquires the pointer to the context local store after spu_acquire()-ing, so that it isn't invalidated by a context switch. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'arch/powerpc/platforms/cell')
-rw-r--r--arch/powerpc/platforms/cell/spufs/run.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index cac69e116776..2619f14546a3 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -323,6 +323,10 @@ static int spu_process_callback(struct spu_context *ctx)
return -EINTR;
}
+ /* need to re-get the ls, as it may have changed when we released the
+ * spu */
+ ls = (void __iomem *)ctx->ops->get_ls(ctx);
+
/* write result, jump over indirect pointer */
memcpy_toio(ls + ls_pointer, &spu_ret, sizeof(spu_ret));
ctx->ops->npc_write(ctx, npc);