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=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 ACA3EC7618F for ; Mon, 15 Jul 2019 14:37:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 82E4221850 for ; Mon, 15 Jul 2019 14:37:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563201438; bh=JF9DCEA4ckHCAc4FqPJnbn/NNhFiUQF5x+Vkx8gH1qc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Woe9atqMWwJe+Iyo7wLWNYnCCTxYh9vbvSsL4Smd6xjfQ7OlFsgs24LGK2Nq8iLEF FUqRsj8f5KJyjXjSkDd7M7/AlXzuiJEB5Kzw5UJ6Kn6duChj957UqSg/QteRai41zS pSvwe4Rvl0+E2s61HXLA95xK9hDAK9po5QuImIM4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404113AbfGOOhQ (ORCPT ); Mon, 15 Jul 2019 10:37:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:58082 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404178AbfGOOhC (ORCPT ); Mon, 15 Jul 2019 10:37:02 -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 CB8B7204FD; Mon, 15 Jul 2019 14:36:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563201421; bh=JF9DCEA4ckHCAc4FqPJnbn/NNhFiUQF5x+Vkx8gH1qc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ohuIlJsUveyCpViLKIl6B78YZb26x66VIgAUj/5X+kQ9VJMNXBwaQ5V5K53g71DOb pa1dZyLDMDpmNAI0JRBT+jdreM2zMSb5Qv08czAyP0eZoAWmdGqcSul5DWHiJc8Cc7 H5LtUSGwfBdk8udM4QHuOJxDlubJWoZVnSeitKj8= 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 4.9 08/73] media: marvell-ccic: fix DMA s/g desc number calculation Date: Mon, 15 Jul 2019 10:35:24 -0400 Message-Id: <20190715143629.10893-8-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715143629.10893-1-sashal@kernel.org> References: <20190715143629.10893-1-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 af59bf4dca2d..a74bfb9afc8d 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -209,7 +209,6 @@ 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) @@ -616,9 +615,11 @@ 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. @@ -626,7 +627,7 @@ 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