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 47CA5C3814E for ; Tue, 23 Aug 2022 11:19:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357476AbiHWLRg (ORCPT ); Tue, 23 Aug 2022 07:17:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352713AbiHWLO4 (ORCPT ); Tue, 23 Aug 2022 07:14:56 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E177CB942C; Tue, 23 Aug 2022 02:18:54 -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 A86C5B81C94; Tue, 23 Aug 2022 09:18:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E59F7C433D6; Tue, 23 Aug 2022 09:18:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1661246322; bh=lpSj1NNhiHPnDfqWLUp3MPq8+c3a0hP1j7exSHushs0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xlWYIA9fgW99sFe0J7zo568Zz9XfxGYTrpq6NVePr4bEwMIheyl75AM/RGUkTRYEA RGfdvDNihfG9MsizFr+MhWSBG3d+IxvaVqI+aQ4VH2jXCiuTk8M334LvK3nMn/X+9Q AZRF4T9ns+V8xO34vdmz6EHDt/AB3W/f2AMTw7LE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Biju Das , Geert Uytterhoeven , Mark Brown , Sasha Levin Subject: [PATCH 5.4 073/389] spi: spi-rspi: Fix PIO fallback on RZ platforms Date: Tue, 23 Aug 2022 10:22:31 +0200 Message-Id: <20220823080118.688874692@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220823080115.331990024@linuxfoundation.org> References: <20220823080115.331990024@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@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 0524741d73b9..8ae2ac40b4b2 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -595,6 +595,10 @@ 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