From patchwork Fri Aug 6 08:14:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 493344 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=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 E2C8BC432BE for ; Fri, 6 Aug 2021 08:16:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C9A7F61211 for ; Fri, 6 Aug 2021 08:16:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244019AbhHFIQn (ORCPT ); Fri, 6 Aug 2021 04:16:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:46044 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243900AbhHFIP7 (ORCPT ); Fri, 6 Aug 2021 04:15:59 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5C673611CE; Fri, 6 Aug 2021 08:15:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628237743; bh=X5OoLP40SLMJExy2I+2pWTpnb1+yy/Vn1uUrqXy3jT4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hgjyKKM9YRbCAdd1NTLef5szyqIVDuRkaLnoGJsKq3k7/EkjyaVlWCdwPmBU4AGcz Sjj3P7qVe/BDzeiP+dKLpQrq5sRx/Z7FAh9pOLeq/TbMVGc2ARPP6fSTMz28Qs0Ool Z+Xkl7Vls+6oFrqNm/rPhw1D77m2CWyNbuNSX+D4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guenter Roeck , Peter Hess , Frank Wunderlich , Mark Brown , Sasha Levin Subject: [PATCH 4.14 06/11] Revert "spi: mediatek: fix fifo rx mode" Date: Fri, 6 Aug 2021 10:14:49 +0200 Message-Id: <20210806081110.723203076@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210806081110.511221879@linuxfoundation.org> References: <20210806081110.511221879@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman This reverts commit 5391ab22bead617d00346d86109e19c7a7288b29 which is commit 3a70dd2d050331ee4cf5ad9d5c0a32d83ead9a43 upstream. It has been found to have problems. Reported-by: Guenter Roeck Cc: Peter Hess Cc: Frank Wunderlich Cc: Mark Brown Cc: Sasha Levin Link: https://lore.kernel.org/r/efee3a58-a4d2-af22-0931-e81b877ab539@roeck-us.net Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-mt65xx.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -392,23 +392,13 @@ static int mtk_spi_fifo_transfer(struct mtk_spi_setup_packet(master); cnt = xfer->len / 4; - if (xfer->tx_buf) - iowrite32_rep(mdata->base + SPI_TX_DATA_REG, xfer->tx_buf, cnt); - - if (xfer->rx_buf) - ioread32_rep(mdata->base + SPI_RX_DATA_REG, xfer->rx_buf, cnt); + iowrite32_rep(mdata->base + SPI_TX_DATA_REG, xfer->tx_buf, cnt); remainder = xfer->len % 4; if (remainder > 0) { reg_val = 0; - if (xfer->tx_buf) { - memcpy(®_val, xfer->tx_buf + (cnt * 4), remainder); - writel(reg_val, mdata->base + SPI_TX_DATA_REG); - } - if (xfer->rx_buf) { - reg_val = readl(mdata->base + SPI_RX_DATA_REG); - memcpy(xfer->rx_buf + (cnt * 4), ®_val, remainder); - } + memcpy(®_val, xfer->tx_buf + (cnt * 4), remainder); + writel(reg_val, mdata->base + SPI_TX_DATA_REG); } mtk_spi_enable_transfer(master);