From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 EBDECC33CAF for ; Thu, 16 Jan 2020 17:45:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB75524780 for ; Thu, 16 Jan 2020 17:45:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579196710; bh=FZyY3AusIL/ws+s305lUHWFZJFeAb3WZkMJPSEuYV+M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yRMYQhIpgc2P9s8YakEzfbLhtUXn5Vf2K/lik6Q510BiRxRtguArN1k+xfotxNEIt jJK3ib4xFke72aWbFS/MkKqRNFVstpnFz2ba7X1eTRhBajLx6CQRqJWqYnGMWP8hvf KCMdgj50EJU1aUp0zBiz6A4VauhDQQN7BaoOx/+w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406102AbgAPRpJ (ORCPT ); Thu, 16 Jan 2020 12:45:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:35840 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405935AbgAPRon (ORCPT ); Thu, 16 Jan 2020 12:44:43 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 405A12476C; Thu, 16 Jan 2020 17:44:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579196682; bh=FZyY3AusIL/ws+s305lUHWFZJFeAb3WZkMJPSEuYV+M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0qa3FMxJahq+MuaLpu+Rn85RqlQvbrXLNYtXPF+uclll8BiZOdtrEY/OnpITRqX7V fELnOVJ3w0dFoAOnEkgTZJsXL/4hm0J9sVJaR/7FTjvnL1K9MApyeyWWjChIdX7nu7 AleXr0Ch7WkgOsMmNjyEbwR4VCFJOrpkAyj7OaHM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alexandru Ardelean , Vinod Koul , Sasha Levin , dmaengine@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 080/174] dmaengine: axi-dmac: Don't check the number of frames for alignment Date: Thu, 16 Jan 2020 12:41:17 -0500 Message-Id: <20200116174251.24326-80-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116174251.24326-1-sashal@kernel.org> References: <20200116174251.24326-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alexandru Ardelean [ Upstream commit 648865a79d8ee3d1aa64aab5eb2a9d12eeed14f9 ] In 2D transfers (for the AXI DMAC), the number of frames (numf) represents Y_LENGTH, and the length of a frame is X_LENGTH. 2D transfers are useful for video transfers where screen resolutions ( X * Y ) are typically aligned for X, but not for Y. There is no requirement for Y_LENGTH to be aligned to the bus-width (or anything), and this is also true for AXI DMAC. Checking the Y_LENGTH for alignment causes false errors when initiating DMA transfers. This change fixes this by checking only that the Y_LENGTH is non-zero. Fixes: 0e3b67b348b8 ("dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller") Signed-off-by: Alexandru Ardelean Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/dma-axi-dmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 5b2395e7e04d..6de3d2142c7d 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -441,7 +441,7 @@ static struct dma_async_tx_descriptor *axi_dmac_prep_interleaved( if (chan->hw_2d) { if (!axi_dmac_check_len(chan, xt->sgl[0].size) || - !axi_dmac_check_len(chan, xt->numf)) + xt->numf == 0) return NULL; if (xt->sgl[0].size + dst_icg > chan->max_length || xt->sgl[0].size + src_icg > chan->max_length) -- 2.20.1