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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 7E0ADC07E99 for ; Mon, 12 Jul 2021 06:44:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A90061167 for ; Mon, 12 Jul 2021 06:44:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235729AbhGLGrb (ORCPT ); Mon, 12 Jul 2021 02:47:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:55100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235533AbhGLGgX (ORCPT ); Mon, 12 Jul 2021 02:36:23 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 77376610FA; Mon, 12 Jul 2021 06:33:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626071590; bh=HlMWwFUjkv9kRDxxoRQ0bxzJXMOvK+avXOn8miRFB+Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JDOQ+X9JbP+7xVxAr8kB7zvco+gxnW05oPaRklpFXRCzNYYpbT9a/wwEiDlso9bRO IVbut3jVSesz6a8EohqW/59+pTLUi0TOjQZDdO4aVQnjeegbrXypE08Y7bZkxiIUmH DqjgB5oflOOstp9pXR4cecmrBYhwIaujR58uVWI0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrzej Pietrasiewicz , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.10 135/593] media: hantro: Fix .buf_prepare Date: Mon, 12 Jul 2021 08:04:55 +0200 Message-Id: <20210712060857.965043605@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060843.180606720@linuxfoundation.org> References: <20210712060843.180606720@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrzej Pietrasiewicz [ Upstream commit 082aaecff35fbe1937531057911b1dd1fc6b496e ] The driver should only set the payload on .buf_prepare if the buffer is CAPTURE type. If an OUTPUT buffer has a zero bytesused set by userspace then v4l2-core will set it to buffer length. If we overwrite bytesused for OUTPUT buffers, too, then vb2_get_plane_payload() will return incorrect value which might be then written to hw registers by the driver in hantro_g1_h264_dec.c. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/staging/media/hantro/hantro_v4l2.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c index f5fbdbc4ffdb..5c2ca61add8e 100644 --- a/drivers/staging/media/hantro/hantro_v4l2.c +++ b/drivers/staging/media/hantro/hantro_v4l2.c @@ -639,7 +639,14 @@ static int hantro_buf_prepare(struct vb2_buffer *vb) ret = hantro_buf_plane_check(vb, pix_fmt); if (ret) return ret; - vb2_set_plane_payload(vb, 0, pix_fmt->plane_fmt[0].sizeimage); + /* + * Buffer's bytesused must be written by driver for CAPTURE buffers. + * (for OUTPUT buffers, if userspace passes 0 bytesused, v4l2-core sets + * it to buffer length). + */ + if (V4L2_TYPE_IS_CAPTURE(vq->type)) + vb2_set_plane_payload(vb, 0, pix_fmt->plane_fmt[0].sizeimage); + return 0; } -- 2.30.2