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,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 4C9E0C76191 for ; Mon, 15 Jul 2019 13:48:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2140B2067C for ; Mon, 15 Jul 2019 13:48:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563198491; bh=UZby9dVk9MFAUqpiU1hi/Ti2aHvwtkwja8ycGnSBRJ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=f4t8rIdv7TIEJi1B8xn/hp5sescBhMcmuwrR2IokQpLpD/otFkqx+Ez3vjrLf+nh1 84Uepf5wQcFOFl8o1HfRkj2wi8ekoBeCxx5ZoG9Kn7AiTREJdSJBIZ7WGWeS8TPnBM cwJA/Ov5VI2TzPKfGTrV3JqyklHFjzPUl4/hV/SE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731424AbfGONsJ (ORCPT ); Mon, 15 Jul 2019 09:48:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:57972 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731389AbfGONsH (ORCPT ); Mon, 15 Jul 2019 09:48:07 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (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 9C24D20651; Mon, 15 Jul 2019 13:48:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563198487; bh=UZby9dVk9MFAUqpiU1hi/Ti2aHvwtkwja8ycGnSBRJ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0Sg+zUxD/tp4i22Uj5WyLUtrlGhYR92GDw7ZgAjO1zflhEuaGPYpHMqR9QWYC2LWu J899qKQXkKHYXHpGihB2clTk4n5y+HauqdUicQd4B/6BB44HUfoVx/x+vBVslHODdU dJAXrhMIOnvwW3qcjS0nDZHmOiQZt+FHPbbEe6LY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Lubomir Rintel , Sakari Ailus , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 5.2 023/249] media: marvell-ccic: fix DMA s/g desc number calculation Date: Mon, 15 Jul 2019 09:43:08 -0400 Message-Id: <20190715134655.4076-23-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715134655.4076-1-sashal@kernel.org> References: <20190715134655.4076-1-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: Lubomir Rintel [ Upstream commit 0c7aa32966dab0b8a7424e1b34c7f206817953ec ] The commit d790b7eda953 ("[media] vb2-dma-sg: move dma_(un)map_sg here") left dma_desc_nent unset. It previously contained the number of DMA descriptors as returned from dma_map_sg(). We can now (since the commit referred to above) obtain the same value from the sg_table and drop dma_desc_nent altogether. Tested on OLPC XO-1.75 machine. Doesn't affect the OLPC XO-1's Cafe driver, since that one doesn't do DMA. [mchehab+samsung@kernel.org: fix a checkpatch warning] Fixes: d790b7eda953 ("[media] vb2-dma-sg: move dma_(un)map_sg here") Signed-off-by: Lubomir Rintel Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/marvell-ccic/mcam-core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c index f1b301810260..0a6411b877e9 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -200,7 +200,6 @@ struct mcam_vb_buffer { struct list_head queue; struct mcam_dma_desc *dma_desc; /* Descriptor virtual address */ dma_addr_t dma_desc_pa; /* Descriptor physical address */ - int dma_desc_nent; /* Number of mapped descriptors */ }; static inline struct mcam_vb_buffer *vb_to_mvb(struct vb2_v4l2_buffer *vb) @@ -608,9 +607,11 @@ static void mcam_dma_contig_done(struct mcam_camera *cam, int frame) static void mcam_sg_next_buffer(struct mcam_camera *cam) { struct mcam_vb_buffer *buf; + struct sg_table *sg_table; buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, queue); list_del_init(&buf->queue); + sg_table = vb2_dma_sg_plane_desc(&buf->vb_buf.vb2_buf, 0); /* * Very Bad Not Good Things happen if you don't clear * C1_DESC_ENA before making any descriptor changes. @@ -618,7 +619,7 @@ static void mcam_sg_next_buffer(struct mcam_camera *cam) mcam_reg_clear_bit(cam, REG_CTRL1, C1_DESC_ENA); mcam_reg_write(cam, REG_DMA_DESC_Y, buf->dma_desc_pa); mcam_reg_write(cam, REG_DESC_LEN_Y, - buf->dma_desc_nent*sizeof(struct mcam_dma_desc)); + sg_table->nents * sizeof(struct mcam_dma_desc)); mcam_reg_write(cam, REG_DESC_LEN_U, 0); mcam_reg_write(cam, REG_DESC_LEN_V, 0); mcam_reg_set_bit(cam, REG_CTRL1, C1_DESC_ENA); -- 2.20.1