From patchwork Fri Jan 23 16:08:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda Delgado X-Patchwork-Id: 5696181 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 5CAB49F357 for ; Fri, 23 Jan 2015 16:31:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8B248202E5 for ; Fri, 23 Jan 2015 16:31:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B4D86202C8 for ; Fri, 23 Jan 2015 16:31:00 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YEh46-0002r1-DC; Fri, 23 Jan 2015 16:26:34 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YEgnr-0003Rj-N6 for linux-arm-kernel@bombadil.infradead.org; Fri, 23 Jan 2015 16:09:47 +0000 Received: from mail-la0-x233.google.com ([2a00:1450:4010:c03::233]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YEgnl-00015O-3C for linux-arm-kernel@lists.infradead.org; Fri, 23 Jan 2015 16:09:41 +0000 Received: by mail-la0-f51.google.com with SMTP id ge10so8110166lab.10 for ; Fri, 23 Jan 2015 08:09:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=GZerqNVv7qYF5uEHNkcAKxcHjRvsBCcmfCeqtQ103K0=; b=A6tesFcGYlb2R5Owa4jGhz6aTXENkSbyS8EP2dtPsDo5wA4xkiuD0WRUnyIiWB0QvF HNivBye/4gLB/JM91LHerqDQSuOd0GY4k/EXjAram934ZReZ9w9jxYKWDqeqRzKNbYdA TlGnywrTARhZvjI9qMQAIpvb+w1sPkgDEqVljaw6S3ukTgQzpk2ndwCkcpsnGp12sGwI nTt8cB1I4B1mdZKKkGfbRkZlZ7xyC8wYNxkRv9iL07RaUGF1F+1UvEtQUUGyTjmG/LJQ B3H2iw8kHGfmZZezuAvGNx9J7CzCLACER/7hGlNUbYkGKopumhebwMrNAkoxGnCpkZtB eIkQ== X-Received: by 10.112.25.7 with SMTP id y7mr8086760lbf.94.1422029358548; Fri, 23 Jan 2015 08:09:18 -0800 (PST) Received: from neopili.qtec.com (cpe.xe-3-0-1-778.vbrnqe10.dk.customer.tdc.net. [80.197.57.18]) by mx.google.com with ESMTPSA id h7sm542990lbl.41.2015.01.23.08.09.17 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 23 Jan 2015 08:09:17 -0800 (PST) From: Ricardo Ribalda Delgado To: Mark Brown , Michal Simek , =?UTF-8?q?S=C3=B6ren=20Brinkmann?= , linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 17/18] spi/xilinx: Remove remaining_words driver data variable Date: Fri, 23 Jan 2015 17:08:49 +0100 Message-Id: <1422029330-10971-18-git-send-email-ricardo.ribalda@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1422029330-10971-1-git-send-email-ricardo.ribalda@gmail.com> References: <1422029330-10971-1-git-send-email-ricardo.ribalda@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150123_110941_287416_D6F7D644 X-CRM114-Status: GOOD ( 13.17 ) X-Spam-Score: -2.7 (--) Cc: Ricardo Ribalda Delgado X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The variable never leaves the scope of txrx_bufs. Signed-off-by: Ricardo Ribalda Delgado --- drivers/spi/spi-xilinx.c | 28 ++++++++++++---------------- 1 file changed, 12 insertions(+), 16 deletions(-) diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 8c25c59..026f4c5 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -86,7 +86,6 @@ struct xilinx_spi { u8 *rx_ptr; /* pointer in the Tx buffer */ const u8 *tx_ptr; /* pointer in the Rx buffer */ - int remaining_words; /* the number of words left to transfer */ u8 bytes_per_word; int buffer_size; /* buffer size in words */ u32 cs_inactive; /* Level of the CS pins when inactive*/ @@ -209,33 +208,27 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi, return 0; } -static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi, int n_words) -{ - xspi->remaining_words -= n_words; - - while (n_words--) - xilinx_spi_tx(xspi); - return; -} - static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) { struct xilinx_spi *xspi = spi_master_get_devdata(spi->master); + int remaining_words; /* the number of words left to transfer */ /* We get here with transmitter inhibited */ xspi->tx_ptr = t->tx_buf; xspi->rx_ptr = t->rx_buf; - xspi->remaining_words = t->len / xspi->bytes_per_word; + remaining_words = t->len / xspi->bytes_per_word; reinit_completion(&xspi->done); - while (xspi->remaining_words) { + while (remaining_words) { u16 cr = 0; - int n_words; + int n_words, tx_words, rx_words; - n_words = min(xspi->remaining_words, xspi->buffer_size); + n_words = min(remaining_words, xspi->buffer_size); - xilinx_spi_fill_tx_fifo(xspi, n_words); + tx_words = n_words; + while (tx_words--) + xilinx_spi_tx(xspi); /* Start the transfer by not inhibiting the transmitter any * longer @@ -261,8 +254,11 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) xspi->regs + XSPI_CR_OFFSET); /* Read out all the data from the Rx FIFO */ - while (n_words--) + rx_words = n_words; + while (rx_words--) xilinx_spi_rx(xspi); + + remaining_words -= n_words; } return t->len;