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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Stewart Smith <stewart@linux.vnet.ibm.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Mike Galbraith <mgalbraith@suse.de>
Subject: [PATCH 4.4 42/92] powerpc/powernv: panic() on OPAL < V3
Date:   Thu, 24 May 2018 11:38:19 +0200
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4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stewart Smith <stewart@linux.vnet.ibm.com>

commit 786842b62f81f20d14894925e8c225328ee8144b upstream.

The OpenPower Abstraction Layer firmware went through a couple
of iterations in the lab before being released. What we now know
as OPAL advertises itself as OPALv3.

OPALv2 and OPALv1 never made it outside the lab, and the possibility
of anyone at all ever building a mainline kernel today and expecting
it to boot on such hardware is zero.

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/platforms/powernv/opal.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -103,11 +103,8 @@ int __init early_init_dt_scan_opal(unsig
 		powerpc_firmware_features |= FW_FEATURE_OPALv2;
 		powerpc_firmware_features |= FW_FEATURE_OPALv3;
 		pr_info("OPAL V3 detected !\n");
-	} else if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) {
-		powerpc_firmware_features |= FW_FEATURE_OPALv2;
-		pr_info("OPAL V2 detected !\n");
 	} else {
-		pr_info("OPAL V1 detected !\n");
+		panic("OPAL != V3 detected, no longer supported.\n");
 	}
 
 	/* Reinit all cores with the right endian */