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 9107DC19F2C for ; Mon, 1 Aug 2022 19:07:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234571AbiHATHH (ORCPT ); Mon, 1 Aug 2022 15:07:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234497AbiHATGQ (ORCPT ); Mon, 1 Aug 2022 15:06:16 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90A4243E5C; Mon, 1 Aug 2022 12:03:51 -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 EF7FA60D33; Mon, 1 Aug 2022 19:03:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC343C433D6; Mon, 1 Aug 2022 19:03:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659380630; bh=i/1U/eWpHoTTWTiO5oNll/0bS36t1ClgEZ+jeCQdIBs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s2ipmFSL9+Wbao951y17IQRWnO92eQP9AgJZoyPVdeAvUk7TawXIWVLqMkBQwB/J8 jYQmDJnnmM7+hUj3WljqGU6s/ElbLxUtDo0j9bhENchButjT3vKr4P/tsZ34vsTm/l R0/UT4kr+AwGIFSr9oUkunVjw1dXAubGMfXM00uXdzwO/yiVAXoqW91pTovSRsnNUl msvVZszwb8ZjFsbou/jSNQD3jrkGcj/p8rcvQTgNGs7bQNOQaaAdE+YYvssyfj+X0h x7A/5RYN+VBEQ/cRk1aihZyhM0Vd3JHH8ChFz3RCxf2f7Of000cMWi84yy7Cm/8P05 wjr8fBTgP0s5g== 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 4.14 2/3] spi: spi-rspi: Fix PIO fallback on RZ platforms Date: Mon, 1 Aug 2022 15:03:42 -0400 Message-Id: <20220801190344.3820044-2-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220801190344.3820044-1-sashal@kernel.org> References: <20220801190344.3820044-1-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 f4a797a9d76e..2fb382050fe7 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -603,6 +603,10 @@ 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->master->dev, "DMA timeout\n"); -- 2.35.1