Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753819AbbBEFmb (ORCPT ); Thu, 5 Feb 2015 00:42:31 -0500 Received: from mga01.intel.com ([192.55.52.88]:62564 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750910AbbBEFm1 (ORCPT ); Thu, 5 Feb 2015 00:42:27 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,522,1418112000"; d="scan'208";a="647613554" From: Jiang Liu To: "Rafael J. Wysocki" , Thomas Gleixner , Bjorn Helgaas , Yinghai Lu , Borislav Petkov , Lv Zheng , Len Brown Cc: Tony Luck , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, Jiang Liu Subject: [Patch v4 04/23] ACPI: Use the length check for io resources as well Date: Thu, 5 Feb 2015 13:44:30 +0800 Message-Id: <1423115089-12904-5-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1423115089-12904-1-git-send-email-jiang.liu@linux.intel.com> References: <1423115089-12904-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3955 Lines: 121 From: Thomas Gleixner Also apply length check to IO resources. [Jiang] Remove enforcement that resource starting address must be non-zero. Signed-off-by: Thomas Gleixner Signed-off-by: Jiang Liu --- drivers/acpi/resource.c | 44 +++++++++++++++++++------------------------- 1 file changed, 19 insertions(+), 25 deletions(-) diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index 3e7d9f6eb875..16d291c60277 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -117,31 +117,30 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) } EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); -static unsigned int acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode, - bool window) +static void acpi_dev_ioresource_flags(struct resource *res, u64 len, + u8 io_decode, bool window) { - int flags = IORESOURCE_IO; + res->flags = IORESOURCE_IO; - if (io_decode == ACPI_DECODE_16) - flags |= IORESOURCE_IO_16BIT_ADDR; + if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) + res->flags |= IORESOURCE_DISABLED; - if (start > end || end >= 0x10003) - flags |= IORESOURCE_DISABLED; + if (res->end >= 0x10003) + res->flags |= IORESOURCE_DISABLED; - if (window) - flags |= IORESOURCE_WINDOW; + if (io_decode == ACPI_DECODE_16) + res->flags |= IORESOURCE_IO_16BIT_ADDR; - return flags; + if (window) + res->flags |= IORESOURCE_WINDOW; } static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, u8 io_decode) { - u64 end = start + len - 1; - res->start = start; - res->end = end; - res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false); + res->end = start + len - 1; + acpi_dev_ioresource_flags(res, len, io_decode, false); } /** @@ -161,16 +160,12 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) switch (ares->type) { case ACPI_RESOURCE_TYPE_IO: io = &ares->data.io; - if (!io->minimum && !io->address_length) - return false; acpi_dev_get_ioresource(res, io->minimum, io->address_length, io->io_decode); break; case ACPI_RESOURCE_TYPE_FIXED_IO: fixed_io = &ares->data.fixed_io; - if (!fixed_io->address && !fixed_io->address_length) - return false; acpi_dev_get_ioresource(res, fixed_io->address, fixed_io->address_length, ACPI_DECODE_10); @@ -178,7 +173,8 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) default: return false; } - return true; + + return !(res->flags & IORESOURCE_DISABLED); } EXPORT_SYMBOL_GPL(acpi_dev_resource_io); @@ -216,9 +212,8 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares, case ACPI_IO_RANGE: io_decode = addr.address.granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; - res->flags = acpi_dev_ioresource_flags(addr.address.minimum, - addr.address.maximum, - io_decode, window); + acpi_dev_ioresource_flags(res, addr.address.address_length, + io_decode, window); break; case ACPI_BUS_NUMBER_RANGE: res->flags = IORESOURCE_BUS; @@ -266,9 +261,8 @@ bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, case ACPI_IO_RANGE: io_decode = ext_addr->address.granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; - res->flags = acpi_dev_ioresource_flags(ext_addr->address.minimum, - ext_addr->address.maximum, - io_decode, window); + acpi_dev_ioresource_flags(res, ext_addr->address.address_length, + io_decode, window); break; case ACPI_BUS_NUMBER_RANGE: res->flags = IORESOURCE_BUS; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/