From patchwork Sat Aug 24 03:49:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 822324 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC9487710C; Sat, 24 Aug 2024 03:49:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724471379; cv=none; b=DNydp7+oHUj7cwXp5ovAU7dE9l69fY2t+xcqUMpfHDcsy8H7APDnebsMVouMp7cl57LFMIuRNRz6JESLNlinkqz90ZPeXmKa7sqWW0GAOcY17Q9TJ9xppYSP5wywvhG7t8IUL3Jq34S6y9Z7AXCgaezGn/CjVkP8xi/j+Zp/Nj4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724471379; c=relaxed/simple; bh=BFDbserhlR5cehnbsKBdFA26QrYkt7KdnUxNBUE9LLM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UK31gnH7NE2sjxhUGpndBlBohVeKwPqbN4SMnFZXOKaF20tkM8gCaGDsu3OgzMt7kEoOOHfDU/GKv93clCw6pZBKKd0O38T8ly2ExfGcU5tKqNPvURd4+kCIk6a2QMJdEEmS7jFv4PWT/y4lZ9t/D/yQ/S8aAIBBM7jl7Tx8Xg0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=tPx46HT/; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="tPx46HT/" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=C7hSBdR/JVARfpeK58WO4kcqQWPz9QPRrMIi46F/pbw=; b=tPx46HT/1sF6ukuutt61ki7ry+ sYLlN62PjveNHfkOHkxK86wIX1nhFj3Q9xUyL1ZLuTJnoDMThRNOynXS6Ck6edZvEpf1ahU9yERW7 GMeDySrEPv4zatSYrvJx81LzFEjX3rpxznHpV+AahQQ0P7vWq004ZvUw2ismjmohd22gs0FoWSH+9 1VHJBbL2y4EjO5mIHbttonms8HND50NHigQBFMaliKkv43obWb5xo+fLiV4jd+09evKLFifYpeNsj z3+qEvUFtRm8Zc0n+9RHR+o0GuuURlKFb9wy/LIzx0IP79SYsH/ZDyduP+rVIOADd/Hq/y7bPYd4j IQj7liPQ==; Received: from 2a02-8389-2341-5b80-7457-864c-9b77-b751.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:7457:864c:9b77:b751] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1shhmS-00000001N17-18bn; Sat, 24 Aug 2024 03:49:36 +0000 From: Christoph Hellwig To: iommu@lists.linux.dev Cc: "Martin K. Petersen" , Robin Murphy , Marek Szyprowski , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-media@vger.kernel.org, linux-mmc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 3/4] dma-mapping: don't return errors from dma_set_seg_boundary Date: Sat, 24 Aug 2024 05:49:14 +0200 Message-ID: <20240824034925.1163244-4-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240824034925.1163244-1-hch@lst.de> References: <20240824034925.1163244-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html A NULL dev->dma_parms indicates either a bus that is not DMA capable or grave bug in the implementation of the bus code. There isn't much the driver can do in terms of error handling for either case, so just warn and continue as DMA operations will fail anyway. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- include/linux/dma-mapping.h | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index cfd6bafec3f944..6bd1333dbacb9b 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -559,13 +559,11 @@ static inline unsigned long dma_get_seg_boundary_nr_pages(struct device *dev, return (dma_get_seg_boundary(dev) >> page_shift) + 1; } -static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask) +static inline void dma_set_seg_boundary(struct device *dev, unsigned long mask) { - if (dev->dma_parms) { - dev->dma_parms->segment_boundary_mask = mask; - return 0; - } - return -EIO; + if (WARN_ON_ONCE(!dev->dma_parms)) + return; + dev->dma_parms->segment_boundary_mask = mask; } static inline unsigned int dma_get_min_align_mask(struct device *dev)