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=-19.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 B20B0C11F6A for ; Sun, 4 Jul 2021 23:08:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D81C61970 for ; Sun, 4 Jul 2021 23:08:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232129AbhGDXLA (ORCPT ); Sun, 4 Jul 2021 19:11:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:46604 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232112AbhGDXKC (ORCPT ); Sun, 4 Jul 2021 19:10:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E209C613F3; Sun, 4 Jul 2021 23:07:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625440031; bh=I9lQf2lDW0MnmYwEu18O4W4OVDj02bCrE5JB6PVuLSs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EYm41YaPv3RUCmjfu6wRfwXcD872AM1Fw+wIrO/uYFUEcyE9HlngeKVG95ngtGMeb JkPWWPacaQqkkXyvq4RG4aJFIXSie525r1FOIPFlYqk1XmNEELgGh9dvhHvOBXEXi1 oeo9i7wyTS1rPLN47zir7wb+PBNlSw0wseYd3jIZ8mWHAfyW48mm391pSeMSCGyu2T 0I19w7Z7ydymvq/wVvJMCzSgwzvGEvVF1mj8DAzZsabC9BRzJFs5+Qw9gFeHzhND1U WuvKzRq4LLSzxhA9HCpB1E43MB1PzDuatqukIZQkkvXaKLUKAum3n+Nz6Qa+1EjXln GWXLJQLfISBhQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andrzej Pietrasiewicz , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-staging@lists.linux.dev Subject: [PATCH AUTOSEL 5.12 40/80] media: hantro: Fix .buf_prepare Date: Sun, 4 Jul 2021 19:05:36 -0400 Message-Id: <20210704230616.1489200-40-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210704230616.1489200-1-sashal@kernel.org> References: <20210704230616.1489200-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-media@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 1bc118e375a1..7ccc6405036a 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