From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 18DDD23CEF8 for ; Tue, 15 Jul 2025 17:06:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752599184; cv=none; b=rDlAWfitD1DIu4FXfek4ssT2xjXDBG2NwLSJiLg9l6+ICPWHMsxHE+t2lzZWoA9S+8A+o2AAHFaR1VpES/Ss8B1+SKq3nBg5mX4L0kHHEVWbjvGRyqeVCyPf0vHp56sULw33rF1VbjvZ+4jJ2FCqrINTmxnP4u6MwL/oDn21kqw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752599184; c=relaxed/simple; bh=dmprwvIrwMR10YyeeVF8jY4ZjJwz0RO3H2+OVCbLtMU=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=gUZk2F4nmigP/yGL6gMGOSne7x3QGzyAnkF6pnjK7eZi6+LGoazlMiJqilfDle63yxYoT0ataEIzOoQu7vfmfC1zzHXZPha3hYtDpuX3CPWR43udI7KMs9Z6jDNuora2Ns8T5+fkNyKMM52Ruldj+7DzUU5GWj1sxOhQF71e32E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=m/6SYyrt; arc=none smtp.client-ip=192.198.163.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="m/6SYyrt" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1752599182; x=1784135182; h=date:from:to:cc:subject:message-id:mime-version; bh=dmprwvIrwMR10YyeeVF8jY4ZjJwz0RO3H2+OVCbLtMU=; b=m/6SYyrtQwd6TpP2yycP2Eskq/Y6e0m3vf5k5H/sKDMdn9r3X+tFKbpn WqY2O+cAOnCbDVw0k/bB13Y+3641xus06zUbQMOCSaS1TrtPxXV1+8cs+ J/pyRpN4kryFwqY8smDBDPBhPlUIwsIRzANX56XyqXgyhkjq5AfOUyVZh MXiOIJuPWLKDKzp+Jle+TN4qOppoG1VUUe58l87hqrOpW/PVabECXN0wT js23r+Fy4bfV8Cx8jo5xQvImpZj1JkNMAsvFYurbFvmQP359E8qW1FiSn +1No2C3Z48LhFkVHo8STiLAYIpke6GWgax8kjrk1K/Tka2aRFY4SuiTjh A==; X-CSE-ConnectionGUID: FhbXyOjpShaARdbiv11Wbw== X-CSE-MsgGUID: cWaY2kuLSx62zsalXrGrzw== X-IronPort-AV: E=McAfee;i="6800,10657,11493"; a="54919233" X-IronPort-AV: E=Sophos;i="6.16,313,1744095600"; d="scan'208";a="54919233" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jul 2025 10:06:20 -0700 X-CSE-ConnectionGUID: nQtRQdyeTh+khW7ZqD4bMg== X-CSE-MsgGUID: NEWsI6h/RQWwtYrJKuSXUw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,313,1744095600"; d="scan'208";a="157368473" Received: from lkp-server01.sh.intel.com (HELO 9ee84586c615) ([10.239.97.150]) by fmviesa006.fm.intel.com with ESMTP; 15 Jul 2025 10:06:19 -0700 Received: from kbuild by 9ee84586c615 with local (Exim 4.96) (envelope-from ) id 1ubj6f-000BN1-14; Tue, 15 Jul 2025 17:06:17 +0000 Date: Wed, 16 Jul 2025 01:05:55 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: Re: [PATCH v2 1/1] mtd: spi-nor: core: Prevent oops during driver removal with active read or write operations Message-ID: <202507160058.Kvt70tJp-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev In-Reply-To: References: TO: khairul.anuar.romli@altera.com TO: Tudor Ambarus TO: Pratyush Yadav TO: Michael Walle TO: Miquel Raynal TO: Richard Weinberger TO: Vignesh Raghavendra TO: "open list:SPI NOR SUBSYSTEM" TO: open list TO: Matthew Gerlach TO: Khairul Anuar Romli Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on mtd/spi-nor/next] [also build test WARNING on linus/master v6.16-rc6 next-20250715] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/khairul-anuar-romli-altera-com/mtd-spi-nor-core-Prevent-oops-during-driver-removal-with-active-read-or-write-operations/20250715-094504 base: https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git spi-nor/next patch link: https://lore.kernel.org/r/d2bba90684f50a66b81ce4d7da3d405783209f95.1752539969.git.khairul.anuar.romli%40altera.com patch subject: [PATCH v2 1/1] mtd: spi-nor: core: Prevent oops during driver removal with active read or write operations :::::: branch date: 15 hours ago :::::: commit date: 15 hours ago config: openrisc-randconfig-r071-20250715 (https://download.01.org/0day-ci/archive/20250716/202507160058.Kvt70tJp-lkp@intel.com/config) compiler: or1k-linux-gcc (GCC) 15.1.0 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202507160058.Kvt70tJp-lkp@intel.com/ smatch warnings: drivers/mtd/spi-nor/core.c:3213 spi_nor_get_device() error: we previously assumed 'dev' could be null (see line 3213) drivers/mtd/spi-nor/core.c:3213 spi_nor_get_device() error: we previously assumed 'dev->driver' could be null (see line 3213) vim +/dev +3213 drivers/mtd/spi-nor/core.c d6084fc83c8249 drivers/mtd/spi-nor/spi-nor.c Kamal Dasu 2017-08-22 3201 be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3202 static int spi_nor_get_device(struct mtd_info *mtd) be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3203 { be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3204 struct mtd_info *master = mtd_get_master(mtd); be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3205 struct spi_nor *nor = mtd_to_spi_nor(master); be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3206 struct device *dev; be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3207 be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3208 if (nor->spimem) be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3209 dev = nor->spimem->spi->controller->dev.parent; be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3210 else be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3211 dev = nor->dev; be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3212 d51eaff2c57a38 drivers/mtd/spi-nor/core.c kromli 2025-07-15 @3213 if (!dev && !dev->driver && !dev->driver->owner) d51eaff2c57a38 drivers/mtd/spi-nor/core.c kromli 2025-07-15 3214 return -EINVAL; d51eaff2c57a38 drivers/mtd/spi-nor/core.c kromli 2025-07-15 3215 be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3216 if (!try_module_get(dev->driver->owner)) be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3217 return -ENODEV; be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3218 be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3219 return 0; be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3220 } be94215be1ab19 drivers/mtd/spi-nor/core.c Xiang Chen 2021-04-01 3221 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki