From patchwork Thu Sep 21 08:54:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huangzheng Lai X-Patchwork-Id: 725046 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 43D37E7D0A6 for ; Thu, 21 Sep 2023 19:31:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231124AbjIUTbP (ORCPT ); Thu, 21 Sep 2023 15:31:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230273AbjIUTaR (ORCPT ); Thu, 21 Sep 2023 15:30:17 -0400 Received: from SHSQR01.spreadtrum.com (mx1.unisoc.com [222.66.158.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DACE257B02; Thu, 21 Sep 2023 10:18:47 -0700 (PDT) Received: from SHSQR01.spreadtrum.com (localhost [127.0.0.2] (may be forged)) by SHSQR01.spreadtrum.com with ESMTP id 38L8vR5h048606; Thu, 21 Sep 2023 16:57:27 +0800 (+08) (envelope-from Huangzheng.Lai@unisoc.com) Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 38L8tXmD040792; Thu, 21 Sep 2023 16:55:33 +0800 (+08) (envelope-from Huangzheng.Lai@unisoc.com) Received: from SHDLP.spreadtrum.com (shmbx04.spreadtrum.com [10.0.1.214]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4Rrq0F2frGz2SZykd; Thu, 21 Sep 2023 16:52:13 +0800 (CST) Received: from xm9614pcu.spreadtrum.com (10.13.2.29) by shmbx04.spreadtrum.com (10.0.1.214) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 21 Sep 2023 16:55:32 +0800 From: Huangzheng Lai To: Andi Shyti CC: Orson Zhai , Baolin Wang , Chunyan Zhang , , , huangzheng lai , Huangzheng Lai , Xiongpeng Wu Subject: [PATCH V2 6/7] i2c: sprd: Increase the waiting time for I2C transmission to avoid system crash issues Date: Thu, 21 Sep 2023 16:54:56 +0800 Message-ID: <20230921085457.32446-7-Huangzheng.Lai@unisoc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230921085457.32446-1-Huangzheng.Lai@unisoc.com> References: <20230921085457.32446-1-Huangzheng.Lai@unisoc.com> MIME-Version: 1.0 X-Originating-IP: [10.13.2.29] X-ClientProxiedBy: SHCAS03.spreadtrum.com (10.0.1.207) To shmbx04.spreadtrum.com (10.0.1.214) X-MAIL: SHSQR01.spreadtrum.com 38L8tXmD040792 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Due to the relatively low priority of the isr_thread, when the CPU load is high, the execution of sprd_i2c_isr_thread will be delayed. After the waiting time is exceeded, the I2C driver will perform operations such as disabling the I2C controller. Later, when sprd_i2c_isr_thread is called by the CPU, there will be kernel panic caused by illegal access to the IIC register. After pressure testing, we found that increasing the IIC waiting time to 10 seconds can avoid this problem. Fixes: 0b884fe71f9e ("i2c: sprd: use a specific timeout to avoid system hang up issue") Cc: # v5.11+ Signed-off-by: Huangzheng Lai --- drivers/i2c/busses/i2c-sprd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index b65729ba7d5a..dbdac89ad482 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -74,7 +74,7 @@ /* timeout (ms) for pm runtime autosuspend */ #define SPRD_I2C_PM_TIMEOUT 1000 /* timeout (ms) for transfer message */ -#define I2C_XFER_TIMEOUT 1000 +#define I2C_XFER_TIMEOUT 10000 /* dynamic modify clk_freq flag */ #define I2C_3M4_FLAG 0x0100 #define I2C_1M_FLAG 0x0080