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powerpc: Don't try OPAL takeover on old 970 blades

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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 <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2011-09-28 20:51:46 +00:00
parent d15f02eb4e
commit 7680057cc4
1 changed files with 10 additions and 0 deletions
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10
arch/powerpc/kernel/prom_init.c
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@ -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));