From: Michael Neuling <mikey@neuling.org>
Date: Tue, 19 Aug 2014 04:48:02 +0000 (+1000)
Subject: powerpc/powernv: Check OPAL dump calls exist before using
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=831cf65b0295de75f40f8cf52ce62e5d261dab4f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

powerpc/powernv: Check OPAL dump calls exist before using

Check that the OPAL_DUMP_READ token exists before initalising the elog
infrastructure.

This avoids littering the OPAL console with:
  "OPAL: Called with bad token 91"

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---

diff --git a/arch/powerpc/platforms/powernv/opal-dump.c b/arch/powerpc/platforms/powernv/opal-dump.c
index 3b819959337c..23260f7dfa7a 100644
--- a/arch/powerpc/platforms/powernv/opal-dump.c
+++ b/arch/powerpc/platforms/powernv/opal-dump.c
@@ -427,6 +427,10 @@ void __init opal_platform_dump_init(void)
 {
 	int rc;
 
+	/* ELOG not supported by firmware */
+	if (!opal_check_token(OPAL_DUMP_READ))
+		return;
+
 	dump_kset = kset_create_and_add("dump", NULL, opal_kobj);
 	if (!dump_kset) {
 		pr_warn("%s: Failed to create dump kset\n", __func__);