[PATCH 4/4] powerpc/powernv: Check OPAL dump calls exist before using

[Michael Neuling]

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 at neuling.org>
---
 arch/powerpc/platforms/powernv/opal-dump.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal-dump.c b/arch/powerpc/platforms/powernv/opal-dump.c
index 85bb8ff..c7577f9 100644
--- a/arch/powerpc/platforms/powernv/opal-dump.c
+++ b/arch/powerpc/platforms/powernv/opal-dump.c
@@ -423,6 +423,10 @@ 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__);
-- 
1.9.1