The firmware on old 970 blades supports some kind of takeover called
"TNK takeover" which will crash if we try to probe for OPAL takeover,
so don't do it.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index e96f5d0..b4fa661 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1313,6 +1313,16 @@ static void prom_query_opal(void)
{
long rc;
+ /* We must not query for OPAL presence on a machine that
+ * supports TNK takeover (970 blades), as this uses the same
+ * h-call with different arguments and will crash
+ */
+ if (PHANDLE_VALID(call_prom("finddevice", 1, 1,
+ ADDR("/tnk-memory-map")))) {
+ prom_printf("TNK takeover detected, skipping OPAL check\n");
+ return;
+ }
+
prom_printf("Querying for OPAL presence... ");
rc = opal_query_takeover(&RELOC(prom_opal_size),
&RELOC(prom_opal_align));
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