Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752219Ab2JZQp1 (ORCPT ); Fri, 26 Oct 2012 12:45:27 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:48093 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750894Ab2JZQp0 (ORCPT ); Fri, 26 Oct 2012 12:45:26 -0400 Message-ID: <508ABE1D.5010106@gmail.com> Date: Fri, 26 Oct 2012 09:45:17 -0700 From: David Daney User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121016 Thunderbird/16.0.1 MIME-Version: 1.0 To: shuah.khan@hp.com CC: ralf@linux-mips.org, kyungmin.park@samsung.com, arnd@arndb.de, andrzej.p@samsung.com, m.szyprowski@samsung.com, linux-mips@linux-mips.org, LKML , shuahkhan@gmail.com Subject: Re: [PATCH RFT RESEND linux-next] mips: dma-mapping: support debug_dma_mapping_error References: <1351208193.6851.17.camel@lorien2> <1351267298.4013.12.camel@lorien2> In-Reply-To: <1351267298.4013.12.camel@lorien2> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1557 Lines: 42 On 10/26/2012 09:01 AM, Shuah Khan wrote: > Add support for debug_dma_mapping_error() call to avoid warning from > debug_dma_unmap() interface when it checks for mapping error checked > status. Without this patch, device driver failed to check map error > warning is generated. > > Signed-off-by: Shuah Khan > --- > arch/mips/include/asm/dma-mapping.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h > index be39a12..006b43e 100644 > --- a/arch/mips/include/asm/dma-mapping.h > +++ b/arch/mips/include/asm/dma-mapping.h > @@ -40,6 +40,8 @@ static inline int dma_supported(struct device *dev, u64 mask) > static inline int dma_mapping_error(struct device *dev, u64 mask) > { > struct dma_map_ops *ops = get_dma_ops(dev); > + > + debug_dma_mapping_error(dev, mask); > return ops->mapping_error(dev, mask); > } > > Although this is a start, I don't think it is sufficient. As far as I can tell, there are many missing calls to debug_dma_*() in the various MIPS commone and sub-architecture DMA code. Really you (or someone) needs to look at *all* the functions in arch/mips/asm/dma-mapping.h, and arch/mips/mm/dma-default.c and find places missing a debug_dma_*(). Thanks, David Daney -- 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/