From patchwork Mon Sep 12 19:07:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 9327673 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 60A2A608A2 for ; Mon, 12 Sep 2016 19:08:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4A2D928E90 for ; Mon, 12 Sep 2016 19:08:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3F2D028E93; Mon, 12 Sep 2016 19:08:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 17D2428E90 for ; Mon, 12 Sep 2016 19:08:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757950AbcILTHp (ORCPT ); Mon, 12 Sep 2016 15:07:45 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:32956 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753771AbcILTHo (ORCPT ); Mon, 12 Sep 2016 15:07:44 -0400 Received: from debutante.sirena.org.uk ([2a01:348:6:8808:fab::3] helo=debutante) by mezzanine.sirena.org.uk with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1bjWZw-0003Ax-0Q; Mon, 12 Sep 2016 19:07:42 +0000 Received: from broonie by debutante with local (Exim 4.87) (envelope-from ) id 1bjWZt-0002iR-7o; Mon, 12 Sep 2016 20:07:37 +0100 From: Mark Brown To: Heiner Kallweit Cc: Mark Brown , Mark Brown , "linux-spi@vger.kernel.org" In-Reply-To: <23b15e58-4833-7180-5c5d-81af382c54c0@gmail.com> Message-Id: Date: Mon, 12 Sep 2016 20:07:37 +0100 X-SA-Exim-Connect-IP: 2a01:348:6:8808:fab::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Applied "spi: fsl-espi: factor out handling of read data" to the spi tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: No (on mezzanine.sirena.org.uk); Unknown failure Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch spi: fsl-espi: factor out handling of read data has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark From cce7e3a2fe39a5b66162a3dc1463a1af598d0803 Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Wed, 7 Sep 2016 22:54:18 +0200 Subject: [PATCH] spi: fsl-espi: factor out handling of read data Factor out copying read data to the read buffers in the original message to a new function fsl_espi_copy_from_buf. This also allows to simplify fsl_espi_copy_to_buf. Signed-off-by: Heiner Kallweit Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-espi.c | 41 +++++++++++++++++++++-------------------- 1 file changed, 21 insertions(+), 20 deletions(-) diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index 7fc9a2c66396..2af7463aea8d 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -77,25 +77,32 @@ struct fsl_espi_reg { #define AUTOSUSPEND_TIMEOUT 2000 -static unsigned int fsl_espi_copy_to_buf(struct spi_message *m, - struct mpc8xxx_spi *mspi) +static void fsl_espi_copy_to_buf(struct spi_message *m, + struct mpc8xxx_spi *mspi) { - unsigned int tx_only = 0; struct spi_transfer *t; u8 *buf = mspi->local_buf; list_for_each_entry(t, &m->transfers, transfer_list) { - if (t->tx_buf) { + if (t->tx_buf) memcpy(buf, t->tx_buf, t->len); - if (!t->rx_buf) - tx_only += t->len; - } else { + else memset(buf, 0, t->len); - } buf += t->len; } +} + +static void fsl_espi_copy_from_buf(struct spi_message *m, + struct mpc8xxx_spi *mspi) +{ + struct spi_transfer *t; + u8 *buf = mspi->local_buf; - return tx_only; + list_for_each_entry(t, &m->transfers, transfer_list) { + if (t->rx_buf) + memcpy(t->rx_buf, buf, t->len); + buf += t->len; + } } static int fsl_espi_check_message(struct spi_message *m) @@ -287,20 +294,17 @@ static int fsl_espi_do_trans(struct spi_message *m, struct spi_transfer *trans) return ret; } -static int fsl_espi_trans(struct spi_message *m, struct spi_transfer *trans, - u8 *rx_buff) +static int fsl_espi_trans(struct spi_message *m, struct spi_transfer *trans) { struct mpc8xxx_spi *mspi = spi_master_get_devdata(m->spi->master); - unsigned int tx_only; int ret; - tx_only = fsl_espi_copy_to_buf(m, mspi); + fsl_espi_copy_to_buf(m, mspi); ret = fsl_espi_do_trans(m, trans); - /* If there is at least one RX byte then copy it to rx_buff */ - if (!ret && rx_buff && trans->len > tx_only) - memcpy(rx_buff, trans->rx_buf + tx_only, trans->len - tx_only); + if (!ret) + fsl_espi_copy_from_buf(m, mspi); return ret; } @@ -309,7 +313,6 @@ static int fsl_espi_do_one_msg(struct spi_master *master, struct spi_message *m) { struct mpc8xxx_spi *mspi = spi_master_get_devdata(m->spi->master); - u8 *rx_buf = NULL; unsigned int delay_usecs = 0, xfer_len = 0; struct spi_transfer *t, trans = {}; int ret; @@ -319,8 +322,6 @@ static int fsl_espi_do_one_msg(struct spi_master *master, goto out; list_for_each_entry(t, &m->transfers, transfer_list) { - if (t->rx_buf) - rx_buf = t->rx_buf; if ((t->tx_buf) || (t->rx_buf)) xfer_len += t->len; if (t->delay_usecs > delay_usecs) @@ -337,7 +338,7 @@ static int fsl_espi_do_one_msg(struct spi_master *master, trans.tx_buf = mspi->local_buf; trans.rx_buf = mspi->local_buf; - ret = fsl_espi_trans(m, &trans, rx_buf); + ret = fsl_espi_trans(m, &trans); m->actual_length = ret ? 0 : trans.len; out: