From patchwork Thu Jul 29 20:15:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 12409697 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB384C19F41 for ; Thu, 29 Jul 2021 20:16:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A800560231 for ; Thu, 29 Jul 2021 20:16:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233240AbhG2UQJ (ORCPT ); Thu, 29 Jul 2021 16:16:09 -0400 Received: from ale.deltatee.com ([204.191.154.188]:59132 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232564AbhG2UP6 (ORCPT ); Thu, 29 Jul 2021 16:15:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:MIME-Version:References:In-Reply-To: Message-Id:Date:Cc:To:From:content-disposition; bh=x3KSnhFQmhq0kDAcj69QIXa3ZhZHzFN2nEhizdLNjiI=; b=sANr7BcTE+BYenm6+gpWCnWZgt a1vbMDbMOWdqeSnuy6+gCxsg3ykH4e1tLmv3LHu7BCfCZ5kPtdlKqdN3HC1+rCC/ooIH2ImcJXDlN 8jKSQ1+r/37FUAT5WVcD/FO6jV8chXBoPy/We7DjNh3Dzic0CwdMDdHXpDFXnRf1+vbyQg8ubpjAK 37wuuawNneI5QWW6HQDMGTSF5DYEgZKQuMBRdaaJwPxbPiGRXYpiqEQjOFAaAmvaMZsXdtPzSOaZ1 ANO+o3NlbiOZsQSea15Ytm6BS2LVHdEvR81DRul4WITMxI1iS66PVfZhi0EzJbq5dw5zcX1Q8AZ1l /ucxZeDQ==; Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m9CRZ-0008VL-R5; Thu, 29 Jul 2021 14:15:50 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1m9CRW-0001UN-Gn; Thu, 29 Jul 2021 14:15:46 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, iommu@lists.linux-foundation.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Christoph Hellwig , Marek Szyprowski , Robin Murphy , Stephen Bates , Martin Oliveira , Logan Gunthorpe Date: Thu, 29 Jul 2021 14:15:38 -0600 Message-Id: <20210729201539.5602-21-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210729201539.5602-1-logang@deltatee.com> References: <20210729201539.5602-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, sbates@raithlin.com, martin.oliveira@eideticom.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v3 20/21] dma-mapping: return error code from dma_dummy_map_sg() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Martin Oliveira The .map_sg() op now expects an error code instead of zero on failure. The only errno to return is -EINVAL in the case when DMA is not supported. Signed-off-by: Martin Oliveira Signed-off-by: Logan Gunthorpe --- kernel/dma/dummy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/dma/dummy.c b/kernel/dma/dummy.c index eacd4c5b10bf..b492d59ac77e 100644 --- a/kernel/dma/dummy.c +++ b/kernel/dma/dummy.c @@ -22,7 +22,7 @@ static int dma_dummy_map_sg(struct device *dev, struct scatterlist *sgl, int nelems, enum dma_data_direction dir, unsigned long attrs) { - return 0; + return -EINVAL; } static int dma_dummy_supported(struct device *hwdev, u64 mask)