From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhang Rui Subject: [PATCH 10/27] pcc_freq: convert acpi_get_handle() to acpi_has_method() Date: Tue, 3 Sep 2013 08:31:58 +0800 Message-ID: <1378168335-22556-11-git-send-email-rui.zhang@intel.com> References: <1378168335-22556-1-git-send-email-rui.zhang@intel.com> Return-path: Received: from mga09.intel.com ([134.134.136.24]:15036 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759231Ab3ICAbG (ORCPT ); Mon, 2 Sep 2013 20:31:06 -0400 In-Reply-To: <1378168335-22556-1-git-send-email-rui.zhang@intel.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: rjw@sisk.pl Cc: linux-pm@vger.kernel.org, Zhang Rui acpi_has_method() is a new ACPI API introduced to check the existence of an ACPI control method. It can be used to replace acpi_get_handle() in the case that 1. the calling function doesn't need the ACPI handle of the control method. and 2. the calling function doesn't care the reason why the method is unavailable. Convert acpi_get_handle() to acpi_has_method() in drivers/cpufreq/pcc_freq.c in this patch. Signed-off-by: Zhang Rui CC: linux-pm@vger.kernel.org --- drivers/cpufreq/pcc-cpufreq.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index d81c4e5..70438de 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -396,15 +396,14 @@ static int __init pcc_cpufreq_probe(void) struct pcc_memory_resource *mem_resource; struct pcc_register_resource *reg_resource; union acpi_object *out_obj, *member; - acpi_handle handle, osc_handle, pcch_handle; + acpi_handle handle, osc_handle; int ret = 0; status = acpi_get_handle(NULL, "\\_SB", &handle); if (ACPI_FAILURE(status)) return -ENODEV; - status = acpi_get_handle(handle, "PCCH", &pcch_handle); - if (ACPI_FAILURE(status)) + if (!acpi_has_method(handle, "PCCH")) return -ENODEV; status = acpi_get_handle(handle, "_OSC", &osc_handle); -- 1.8.1.2