From patchwork Mon Mar 1 16:08:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 389692 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 8B3ECC433E6 for ; Mon, 1 Mar 2021 18:29:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5364964F57 for ; Mon, 1 Mar 2021 18:29:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239901AbhCAS13 (ORCPT ); Mon, 1 Mar 2021 13:27:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:39690 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239756AbhCASUe (ORCPT ); Mon, 1 Mar 2021 13:20:34 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 23C6B651C4; Mon, 1 Mar 2021 17:16:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614619006; bh=jStxmN0GRKAnqHt1nhbljYEq4i+PwkcP8PPGxiD/gxA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xOMVCSr9U2NaqdPx5oPxqO5m78PCvRFuW17xLoECoYKNuzELxLD0XDKZ3l0fdU9yB bPLTKlXBwhfV9dWURZ01b63FJ4BibVqskmXdChee51pcLWpm+heK4tVTIuUxOaiXND MDTtQMaKUr7eI0WtY5HDRyWxaTHWF7yuXSkH8c+g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rayagonda Kokatanur , Ray Jui , Wolfram Sang , Sasha Levin Subject: [PATCH 5.10 267/663] i2c: iproc: handle only slave interrupts which are enabled Date: Mon, 1 Mar 2021 17:08:35 +0100 Message-Id: <20210301161155.024978379@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161141.760350206@linuxfoundation.org> References: <20210301161141.760350206@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rayagonda Kokatanur [ Upstream commit 545f4011e156554d704d6278245d54543f6680d1 ] Handle only slave interrupts which are enabled. The IS_OFFSET register contains the interrupt status bits which will be set regardless of the enabling of the corresponding interrupt condition. One must therefore look at both IS_OFFSET and IE_OFFSET to determine whether an interrupt condition is set and enabled. Fixes: c245d94ed106 ("i2c: iproc: Add multi byte read-write support for slave mode") Signed-off-by: Rayagonda Kokatanur Acked-by: Ray Jui Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-bcm-iproc.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c index d8295b1c379d1..b98433c04d184 100644 --- a/drivers/i2c/busses/i2c-bcm-iproc.c +++ b/drivers/i2c/busses/i2c-bcm-iproc.c @@ -505,12 +505,17 @@ static void bcm_iproc_i2c_process_m_event(struct bcm_iproc_i2c_dev *iproc_i2c, static irqreturn_t bcm_iproc_i2c_isr(int irq, void *data) { struct bcm_iproc_i2c_dev *iproc_i2c = data; - u32 status = iproc_i2c_rd_reg(iproc_i2c, IS_OFFSET); + u32 slave_status; + u32 status; bool ret; - u32 sl_status = status & ISR_MASK_SLAVE; - if (sl_status) { - ret = bcm_iproc_i2c_slave_isr(iproc_i2c, sl_status); + status = iproc_i2c_rd_reg(iproc_i2c, IS_OFFSET); + /* process only slave interrupt which are enabled */ + slave_status = status & iproc_i2c_rd_reg(iproc_i2c, IE_OFFSET) & + ISR_MASK_SLAVE; + + if (slave_status) { + ret = bcm_iproc_i2c_slave_isr(iproc_i2c, slave_status); if (ret) return IRQ_HANDLED; else