From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753019AbaCKOle (ORCPT ); Tue, 11 Mar 2014 10:41:34 -0400 Received: from mga01.intel.com ([192.55.52.88]:64019 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751590AbaCKOlc (ORCPT ); Tue, 11 Mar 2014 10:41:32 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,631,1389772800"; d="scan'208";a="496210042" From: Zhang Rui To: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: rafael.j.wysocki@intel.com, jwollrath@web.de, markus@trippelsdorf.de, pebolle@tiscali.nl, Zhang Rui Subject: [PATCH] PNPACPI: proper handling ACPI IO/Memory resources Date: Tue, 11 Mar 2014 22:40:27 +0800 Message-Id: <1394548827-15172-1-git-send-email-rui.zhang@intel.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Before commit b355cee88e3b1a193f0e9a81db810f6f83ad728b, if acpi_dev_resource_memory()/acpi_dev_resource_io() returns false, it means the the resource is not a memeory/IO resource. But after commit b355cee88e3b1a193f0e9a81db810f6f83ad728b, if the memory/IO resource is invalid (the length of the resource is zero), acpi_dev_resource_memory()/acpi_dev_resource_io() returns false as well. This breaks pnpacpi_allocated_resource(), because the current code would recognize the invalid memory/io resource as unknown resource type. Thus users will get warning messages on machines with zero length ACPI memeory/IO resources. This patch fixes the problem by invoking acpi_dev_resource_memory()/ acpi_dev_resource_io() for ACPI memory/IO resources only. Signed-off-by: Zhang Rui --- drivers/pnp/pnpacpi/rsparser.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c index 167f3d0..66977eb 100644 --- a/drivers/pnp/pnpacpi/rsparser.c +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -183,9 +183,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res, struct resource r = {0}; int i, flags; - if (acpi_dev_resource_memory(res, &r) - || acpi_dev_resource_io(res, &r) - || acpi_dev_resource_address_space(res, &r) + if (acpi_dev_resource_address_space(res, &r) || acpi_dev_resource_ext_address_space(res, &r)) { pnp_add_resource(dev, &r); return AE_OK; @@ -217,6 +215,17 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res, } switch (res->type) { + case ACPI_RESOURCE_TYPE_MEMORY24: + case ACPI_RESOURCE_TYPE_MEMORY32: + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: + if (acpi_dev_resource_memory(res, &r)) + pnp_add_resource(dev, &r); + break; + case ACPI_RESOURCE_TYPE_IO: + case ACPI_RESOURCE_TYPE_FIXED_IO: + if (acpi_dev_resource_io(res, &r)) + pnp_add_resource(dev, &r); + break; case ACPI_RESOURCE_TYPE_DMA: dma = &res->data.dma; if (dma->channel_count > 0 && dma->channels[0] != (u8) -1) -- 1.7.9.5