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powerpc/powernv: Check OPAL elog calls exist before using

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

This avoids littering the OPAL console with:
  "OPAL: Called with bad token 74"

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Neuling 2014-08-19 14:48:01 +10:00 committed by Michael Ellerman
parent 035ed26fb0
commit 7dc992ec7b
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/platforms/powernv/opal-elog.c
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@ -295,6 +295,10 @@ int __init opal_elog_init(void)
{
int rc = 0;
/* ELOG not supported by firmware */
if (!opal_check_token(OPAL_ELOG_READ))
return -1;
elog_kset = kset_create_and_add("elog", NULL, opal_kobj);
if (!elog_kset) {
pr_warn("%s: failed to create elog kset\n", __func__);