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 X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5BA1BC433E1 for ; Fri, 17 Jul 2020 06:30:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32ED321744 for ; Fri, 17 Jul 2020 06:30:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726941AbgGQGae (ORCPT ); Fri, 17 Jul 2020 02:30:34 -0400 Received: from mga05.intel.com ([192.55.52.43]:36357 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726056AbgGQGad (ORCPT ); Fri, 17 Jul 2020 02:30:33 -0400 IronPort-SDR: eOAgvwNVPU2UIMNm0XUId69rJ032JntmN50i05ReQd4bO1+wxHTbw6AOHEtzdwoKYqrHwWy+R3 Oy3Dpk/9o9kQ== X-IronPort-AV: E=McAfee;i="6000,8403,9684"; a="234396381" X-IronPort-AV: E=Sophos;i="5.75,362,1589266800"; d="scan'208";a="234396381" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jul 2020 23:30:32 -0700 IronPort-SDR: Lj4qFW8tzWRNVv9EKIP7QNrp+S18tBsSR7F8uqXKPlwmlGFAQ/An+gHJhAmtvg8u8Q4cDxh/j7 PmFu08l2J9Kg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,362,1589266800"; d="scan'208";a="325352362" Received: from sgsxdev004.isng.intel.com (HELO localhost) ([10.226.88.13]) by FMSMGA003.fm.intel.com with ESMTP; 16 Jul 2020 23:30:29 -0700 From: Dilip Kota To: broonie@kernel.org, robh@kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org, daniel.schwierzeck@gmail.com, hauke@hauke-m.de, andriy.shevchenko@intel.com, cheol.yong.kim@intel.com, chuanhua.lei@linux.intel.com, qi-ming.wu@intel.com, Dilip Kota Subject: [PATCH v2 2/8] spi: lantiq: Add SMP support Date: Fri, 17 Jul 2020 14:27:51 +0800 Message-Id: X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Existing driver supports only single core SoC. New multicore platforms uses the same driver/IP so SMP support is required. This patch adds multicore support in the driver. Signed-off-by: Dilip Kota --- drivers/spi/spi-lantiq-ssc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/spi/spi-lantiq-ssc.c b/drivers/spi/spi-lantiq-ssc.c index 44600fb71c484..1073a70a4beba 100644 --- a/drivers/spi/spi-lantiq-ssc.c +++ b/drivers/spi/spi-lantiq-ssc.c @@ -623,7 +623,9 @@ static void rx_request(struct lantiq_ssc_spi *spi) static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data) { struct lantiq_ssc_spi *spi = data; + unsigned long flags; + spin_lock_irqsave(&spi->lock, flags); if (spi->tx) { if (spi->rx && spi->rx_todo) rx_fifo_read_full_duplex(spi); @@ -645,10 +647,12 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data) } } + spin_unlock_irqrestore(&spi->lock, flags); return IRQ_HANDLED; completed: queue_work(spi->wq, &spi->work); + spin_unlock_irqrestore(&spi->lock, flags); return IRQ_HANDLED; } @@ -657,10 +661,12 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data) { struct lantiq_ssc_spi *spi = data; u32 stat = lantiq_ssc_readl(spi, LTQ_SPI_STAT); + unsigned long flags; if (!(stat & LTQ_SPI_STAT_ERRORS)) return IRQ_NONE; + spin_lock_irqsave(&spi->lock, flags); if (stat & LTQ_SPI_STAT_RUE) dev_err(spi->dev, "receive underflow error\n"); if (stat & LTQ_SPI_STAT_TUE) @@ -681,6 +687,7 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data) if (spi->master->cur_msg) spi->master->cur_msg->status = -EIO; queue_work(spi->wq, &spi->work); + spin_unlock_irqrestore(&spi->lock, flags); return IRQ_HANDLED; } -- 2.11.0