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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B262C00144 for ; Mon, 1 Aug 2022 19:05:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234136AbiHATFI (ORCPT ); Mon, 1 Aug 2022 15:05:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234335AbiHATEb (ORCPT ); Mon, 1 Aug 2022 15:04:31 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B0AE402CC; Mon, 1 Aug 2022 12:03:10 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9B4EA61227; Mon, 1 Aug 2022 19:03:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45337C433D6; Mon, 1 Aug 2022 19:03:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659380589; bh=d/iGv3GxcSHuxsO3Syz/ugha7MoQ9UUrS+dhzXkqnuc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=usQY6CkEjKhkql7+wU8XT0ztMsMdP+K6t1QV5NVYJu3GBUi/sNjWF5p0iIILLnJ86 kV+rIg/s+RKjCvScIfW37JLiRXlMJsB9ivoVLvSj40fawH9PCLQ7hgX0PtE3pl0Xfu VQRg4E6ICD/T+OpYOoq88ny7P02ZvjIiw/jyEeVFpDTQz6qFc7jSqyPm6WUWraCgxy x7k6yidd2xtJRYoJR7NdveEHXBu4pxJBfHTar7MG2ymer5dQO+DpV19XrJV/651rlr ODu3d/JvgMJ0fdDknRKHL29f0kcmACfbyj0ZHM/gOGEwpmJ7XwCLiXizUnAKvYM3+m MpTml4fglUMdw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Biju Das , Geert Uytterhoeven , Mark Brown , Sasha Levin , linux-spi@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 3/7] spi: spi-rspi: Fix PIO fallback on RZ platforms Date: Mon, 1 Aug 2022 15:02:57 -0400 Message-Id: <20220801190301.3819065-3-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220801190301.3819065-1-sashal@kernel.org> References: <20220801190301.3819065-1-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-kernel@vger.kernel.org From: Biju Das [ Upstream commit b620aa3a7be346f04ae7789b165937615c6ee8d3 ] RSPI IP on RZ/{A, G2L} SoC's has the same signal for both interrupt and DMA transfer request. Setting DMARS register for DMA transfer makes the signal to work as a DMA transfer request signal and subsequent interrupt requests to the interrupt controller are masked. PIO fallback does not work as interrupt signal is disabled. This patch fixes this issue by re-enabling the interrupts by calling dmaengine_synchronize(). Signed-off-by: Biju Das Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220721143449.879257-1-biju.das.jz@bp.renesas.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-rspi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index ea03cc589e61..4600e3c9e49e 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -612,6 +612,10 @@ static int rspi_dma_transfer(struct rspi_data *rspi, struct sg_table *tx, rspi->dma_callbacked, HZ); if (ret > 0 && rspi->dma_callbacked) { ret = 0; + if (tx) + dmaengine_synchronize(rspi->ctlr->dma_tx); + if (rx) + dmaengine_synchronize(rspi->ctlr->dma_rx); } else { if (!ret) { dev_err(&rspi->ctlr->dev, "DMA timeout\n"); -- 2.35.1