From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753728Ab1A0DOw (ORCPT ); Wed, 26 Jan 2011 22:14:52 -0500 Received: from smtp-out.google.com ([216.239.44.51]:8228 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752517Ab1A0DOv (ORCPT ); Wed, 26 Jan 2011 22:14:51 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=google.com; s=beta; h=date:from:x-x-sender:to:cc:subject:message-id:user-agent :mime-version:content-type; b=XiF3lGoaVMNoxIN1OJ13gUVK1EdqeEMQadZr9M6gOFApzVu4ZqOC0z11v0TcTm9wy9 J0GwiHmmmb3im/5car5w== Date: Wed, 26 Jan 2011 19:14:42 -0800 (PST) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Andrew Morton , Adam Belay , Bjorn Helgaas cc: Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Russell King , x86@kernel.org, linux-kernel@vger.kernel.org Subject: [patch 1/4] pnp: only assign IORESOURCE_DMA if CONFIG_ISA_DMA_API is enabled Message-ID: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org IORESOURCE_DMA cannot be assigned without utilizing the interface provided by CONFIG_ISA_DMA_API, specifically request_dma() and free_dma(). Thus, there's a strict dependency on the config option and limits IORESOURCE_DMA only to architectures that support ISA-style DMA. ia64 is not one of those architectures, so pnp_check_dma() no longer needs to be special-cased for that architecture. pnp_assign_resources() will now return -EINVAL if IORESOURCE_DMA is attempted on such a kernel. Signed-off-by: David Rientjes --- drivers/pnp/base.h | 2 ++ drivers/pnp/manager.c | 7 ++++++- drivers/pnp/resource.c | 7 ++----- 3 files changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h --- a/drivers/pnp/base.h +++ b/drivers/pnp/base.h @@ -142,7 +142,9 @@ void __pnp_remove_device(struct pnp_dev *dev); int pnp_check_port(struct pnp_dev *dev, struct resource *res); int pnp_check_mem(struct pnp_dev *dev, struct resource *res); int pnp_check_irq(struct pnp_dev *dev, struct resource *res); +#ifdef CONFIG_ISA_DMA_API int pnp_check_dma(struct pnp_dev *dev, struct resource *res); +#endif char *pnp_resource_type_name(struct resource *res); void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc); diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c --- a/drivers/pnp/manager.c +++ b/drivers/pnp/manager.c @@ -171,6 +171,7 @@ __add: return 0; } +#ifdef CONFIG_ISA_DMA_API static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) { struct resource *res, local_res; @@ -210,6 +211,7 @@ __add: pnp_add_dma_resource(dev, res->start, res->flags); return 0; } +#endif /* CONFIG_ISA_DMA_API */ void pnp_init_resources(struct pnp_dev *dev) { @@ -234,7 +236,8 @@ static void pnp_clean_resource_table(struct pnp_dev *dev) static int pnp_assign_resources(struct pnp_dev *dev, int set) { struct pnp_option *option; - int nport = 0, nmem = 0, nirq = 0, ndma = 0; + int nport = 0, nmem = 0, nirq = 0; + int ndma __maybe_unused = 0; int ret = 0; pnp_dbg(&dev->dev, "pnp_assign_resources, try dependent set %d\n", set); @@ -256,9 +259,11 @@ static int pnp_assign_resources(struct pnp_dev *dev, int set) case IORESOURCE_IRQ: ret = pnp_assign_irq(dev, &option->u.irq, nirq++); break; +#ifdef CONFIG_ISA_DMA_API case IORESOURCE_DMA: ret = pnp_assign_dma(dev, &option->u.dma, ndma++); break; +#endif default: ret = -EINVAL; break; diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c --- a/drivers/pnp/resource.c +++ b/drivers/pnp/resource.c @@ -409,9 +409,9 @@ int pnp_check_irq(struct pnp_dev *dev, struct resource *res) return 1; } +#ifdef CONFIG_ISA_DMA_API int pnp_check_dma(struct pnp_dev *dev, struct resource *res) { -#ifndef CONFIG_IA64 int i; struct pnp_dev *tdev; struct resource *tres; @@ -466,11 +466,8 @@ int pnp_check_dma(struct pnp_dev *dev, struct resource *res) } return 1; -#else - /* IA64 does not have legacy DMA */ - return 0; -#endif } +#endif /* CONFIG_ISA_DMA_API */ unsigned long pnp_resource_type(struct resource *res) {