Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758622AbcLPSlE (ORCPT ); Fri, 16 Dec 2016 13:41:04 -0500 Received: from userp1050.oracle.com ([156.151.31.82]:17803 "EHLO userp1050.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758175AbcLPSky (ORCPT ); Fri, 16 Dec 2016 13:40:54 -0500 From: Boris Ostrovsky To: rjw@rjwysocki.net, lenb@kernel.org Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Boris Ostrovsky Subject: [PATCH] ACPI/CPC: Don't try to clean up uninitialized CPC data Date: Fri, 16 Dec 2016 13:35:46 -0500 Message-Id: <1481913346-16321-1-git-send-email-boris.ostrovsky@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Source-IP: userp1040.oracle.com [156.151.31.81] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 735 Lines: 24 If acpi_cppc_processor_probe() had not executed successfully (for example, if _CPC object was not found) then cpc_desc_ptr for that processor will be invalid. Signed-off-by: Boris Ostrovsky --- drivers/acpi/cppc_acpi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index d0d0504..5bba26e 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -824,6 +824,8 @@ void acpi_cppc_processor_exit(struct acpi_processor *pr) void __iomem *addr; cpc_ptr = per_cpu(cpc_desc_ptr, pr->id); + if (!cpc_ptr) + return; /* Free all the mapped sys mem areas for this CPU */ for (i = 2; i < cpc_ptr->num_entries; i++) { -- 1.8.3.1