From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752010AbeAWO10 (ORCPT ); Tue, 23 Jan 2018 09:27:26 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:50705 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751706AbeAWO1A (ORCPT ); Tue, 23 Jan 2018 09:27:00 -0500 From: Philippe Cornu To: Archit Taneja , Andrzej Hajda , Laurent Pinchart , David Airlie , Philippe Cornu , Brian Norris , Benjamin Gaignard , Bhumika Goyal , , , "Sandy Huang" , Heiko Stubner , , CC: Yannick Fertre , Vincent Abriou , Alexandre Torgue , "Maxime Coquelin" , Ludovic Barre , Mickael Reulier Subject: [PATCH v1 1/2] drm/bridge/synopsys: dsi: Fix dsi_host_transfer() return value Date: Tue, 23 Jan 2018 15:26:17 +0100 Message-ID: <20180123142618.28384-2-philippe.cornu@st.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180123142618.28384-1-philippe.cornu@st.com> References: <20180123142618.28384-1-philippe.cornu@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.201.23.32] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-01-23_04:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The dw_mipi_dsi_host_transfer() must return the number of bytes transmitted/received on success instead of 0. Note: nb_bytes is introduced in this patch as it will be re-used with the future dcs/generic dsi read feature. Signed-off-by: Philippe Cornu --- drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index f458798af788..096cf5e5bb30 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -403,7 +403,7 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host, { struct dw_mipi_dsi *dsi = host_to_dsi(host); struct mipi_dsi_packet packet; - int ret; + int ret, nb_bytes; ret = mipi_dsi_create_packet(&packet, msg); if (ret) { @@ -413,7 +413,13 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host, dw_mipi_message_config(dsi, msg); - return dw_mipi_dsi_write(dsi, &packet); + ret = dw_mipi_dsi_write(dsi, &packet); + if (ret) + return ret; + + nb_bytes = packet.size; + + return nb_bytes; } static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = { -- 2.15.1