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 A19D5C3F6B0 for ; Mon, 1 Aug 2022 19:02:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233626AbiHATCt (ORCPT ); Mon, 1 Aug 2022 15:02:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51134 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233259AbiHATCi (ORCPT ); Mon, 1 Aug 2022 15:02:38 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 804162FFFE; Mon, 1 Aug 2022 12:02:36 -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 ams.source.kernel.org (Postfix) with ESMTPS id 27419B81629; Mon, 1 Aug 2022 19:02:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2564EC433D7; Mon, 1 Aug 2022 19:02:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659380553; bh=DnYtPbjqI8A7s1DpXgqq9UjiYSjr7NuAbLDSButeqbE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=boKslA5vqRuQ5Z0JYsQ/D8t0LHmiRTAN424PQx9ptIv5XyOHdiCuDE5Jfnp9AQqRm PbmPB4WX6ahPUkGBmTSdSyoqhLhKEPx4rJj2W841vjCQVB2mk6EbMpwKmzlCeoMZ74 90moez1bkSXdxstvUI+GQ7kU36pix3fJeqCbK5N4PIyHkxbyXULVlVG+jnFoVSesPP XutcxH6fe9Swc1KRK3LFhc7lCBjYbUN3vHOHfEmiTUuTQf+gYTc3+uJrtDt7SXTDbA wAPBo82jLdGY4t0Q8etNQsLR/EhOdBmIRjNK4UJmk1lGxY+WuFBj34sSiyaWCTo7vr OsciX+qAMxGow== 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 5.18 05/10] spi: spi-rspi: Fix PIO fallback on RZ platforms Date: Mon, 1 Aug 2022 15:02:17 -0400 Message-Id: <20220801190222.3818378-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220801190222.3818378-1-sashal@kernel.org> References: <20220801190222.3818378-1-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-spi@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 7a014eeec2d0..411b1307b7fd 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -613,6 +613,10 @@ 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