From patchwork Mon Sep 30 14:59:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 13816587 X-Patchwork-Delegate: geert@linux-m68k.org Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 A037D1917F1 for ; Mon, 30 Sep 2024 14:59:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.117.254.33 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727708401; cv=none; b=R+eCYNgagC5P36R6wweW7HQPegfit0V6ryHXzjPwJ/7MlakcriKgzF7dsT1tUSyo70wiXRREy1HQIhhd5L3rwKU2oQ/EBJo8uyjenjej7WhNEFW0+o2comkpOuCUHbWbtqHAciiDwcdVKsVEnRo2p18v7G0Wi3B22b/nd1YuEkc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727708401; c=relaxed/simple; bh=IW4P0dA51k8Ccb+8Vq9h4ral2GecoXnmNnoryGsZxMM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GE5E8pL0B+vsT/fhS7FcbLPXRi9RB9Nw8MxKzCRNPqHCi3qyJRLYyyM+QLGlvr1NXSRB/746jzmd8+GyswO5BAOIUEgN+/JvM9CBMoIZhZTPX15S1dcq8EINjyjfchu1F8TLB5pQZhf9B6UDN+KkWJQh+UvAwVP/2UicOt0R9wY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com; spf=pass smtp.mailfrom=sang-engineering.com; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b=Iga73FiM; arc=none smtp.client-ip=194.117.254.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="Iga73FiM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; s=k1; bh=1t1j0IfehHHrwnyAo3CZ9tu5Bk9Gr8jQRiRmvo9kQHA=; b=Iga73F iMy4sZKwtZAfA9pAr1DZK+Y+zzpE6B5fbQJFjnYi9qA4ElO569eiO7GwBB1sn0BC msNOB61C0V7gvwMN55NroSVyWYZtM5oXYsf15FruX7dkoLSzLNg+mvwMfLPgDyJY TyPEXgTUG4yczqM8/MkbVaRZYMUda1U3MdnoSmYKZLDfoBE/sS9Emox8ukrev9yz 3nS02+mkWpUnh3RGDV4n95icMlfFQD0Sd7Ci/0NSWeePQ0+f2zTfjcCIvDBipfU1 yu0UzWjj3S0z62+R5uduR3sTr7+z3pwuZc+nrklwrdbLyWvHlg7sY94q2IFxLEWp SjL/kRgvHWsAn54Q== Received: (qmail 2222634 invoked from network); 30 Sep 2024 16:59:57 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 30 Sep 2024 16:59:57 +0200 X-UD-Smtp-Session: l3s3148p1@S1FOdVcj4OYujnsJ From: Wolfram Sang To: linux-renesas-soc@vger.kernel.org Cc: Biju Das , Wolfram Sang , Vinod Koul , Lad Prabhakar , dmaengine@vger.kernel.org Subject: [PATCH 1/3] dmaengine: sh: rz-dmac: handle configs where one address is zero Date: Mon, 30 Sep 2024 16:59:52 +0200 Message-ID: <20240930145955.4248-2-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240930145955.4248-1-wsa+renesas@sang-engineering.com> References: <20240930145955.4248-1-wsa+renesas@sang-engineering.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Configs like the ones coming from the MMC subsystem will have either 'src' or 'dst' zeroed, resulting in an unknown bus width. This will bail out on the RZ DMA driver because of the sanity check for a valid bus width. Reorder the code, so that the check will only be applied when the corresponding address is non-zero. Fixes: 5000d37042a6 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC") Signed-off-by: Wolfram Sang Reviewed-by: Biju Das Tested-by: Claudiu Beznea Tested-by: Biju Das --- drivers/dma/sh/rz-dmac.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c index 65a27c5a7bce..811389fc9cb8 100644 --- a/drivers/dma/sh/rz-dmac.c +++ b/drivers/dma/sh/rz-dmac.c @@ -601,22 +601,25 @@ static int rz_dmac_config(struct dma_chan *chan, struct rz_dmac_chan *channel = to_rz_dmac_chan(chan); u32 val; - channel->src_per_address = config->src_addr; channel->dst_per_address = config->dst_addr; - - val = rz_dmac_ds_to_val_mapping(config->dst_addr_width); - if (val == CHCFG_DS_INVALID) - return -EINVAL; - channel->chcfg &= ~CHCFG_FILL_DDS_MASK; - channel->chcfg |= FIELD_PREP(CHCFG_FILL_DDS_MASK, val); + if (channel->dst_per_address) { + val = rz_dmac_ds_to_val_mapping(config->dst_addr_width); + if (val == CHCFG_DS_INVALID) + return -EINVAL; - val = rz_dmac_ds_to_val_mapping(config->src_addr_width); - if (val == CHCFG_DS_INVALID) - return -EINVAL; + channel->chcfg |= FIELD_PREP(CHCFG_FILL_DDS_MASK, val); + } + channel->src_per_address = config->src_addr; channel->chcfg &= ~CHCFG_FILL_SDS_MASK; - channel->chcfg |= FIELD_PREP(CHCFG_FILL_SDS_MASK, val); + if (channel->src_per_address) { + val = rz_dmac_ds_to_val_mapping(config->src_addr_width); + if (val == CHCFG_DS_INVALID) + return -EINVAL; + + channel->chcfg |= FIELD_PREP(CHCFG_FILL_SDS_MASK, val); + } return 0; }