From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 6F866A935 for ; Sat, 5 Oct 2024 00:41:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728088910; cv=none; b=t910pqkfjbIbfAkgF6paNMXlXLgVMNLpP1JDEc1hOzVdD2TSpFYMqsLT3stXbuf9d54HTojMmn+ThgFNd77egfwIhoGwIzQ3ELKmnsBqPnz7LA0igfsxDpVC73Ky+0oNNQAVxDnRJp5+RIn4krJMlEQnjVPenzejd9vehqx/qX0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728088910; c=relaxed/simple; bh=2M/D9Typdkn5WPBvULuEV2b4prvbbWg2bBEFAeElKkg=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=UexaPIjNboEP4KLWEzx/rLmzxtnYBXAEQjHCnJBg0J5p3d2tfAvWGScXMOBPq3x/EZ92GWoicrw1ZHWhix4aqGgprY47aalZHgaSk5uWC9JSacIKGKI3UtMQMiV65fWwoDZtoOvUM1JsbXncE02cTd6C19epLyHmS+QOeY0v3wI= 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=D2OzIHjq; arc=none smtp.client-ip=198.175.65.10 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="D2OzIHjq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728088908; x=1759624908; h=date:from:to:cc:subject:message-id:mime-version; bh=2M/D9Typdkn5WPBvULuEV2b4prvbbWg2bBEFAeElKkg=; b=D2OzIHjqEGBN8wj203FIXSgvNHXaqEfzDQFp4+OBmSy7/k8+GG3UCgLV Vp7R8FaH89Oa7czWWkDIGfm17XpYnntYLCWrehBVWi0jXoq3REcFKtlC+ muzW/IVs6QTLkZSHmehMrpG4CrcC0mGgT3RKAJPv8P17F18fb1d9MIS4C qQG4EdCVbHy/ng1hHq/J44sNc8qJWDvJ/n26L3hVDmHUoQCQu1yL52mci 4BoOKDk2tBMv7I4GCl4Dmu1r+LTBnE+jJeKq6ZRr0Q7sEcxPKk2eO1Y3f 5rovUBbex610TQBuwHtBJZRh+aM4jfnWyHe+WgmGDzO6yT1ZdI3DKRHSn g==; X-CSE-ConnectionGUID: BcMe7c5lTQm0Wj/nq4tsNA== X-CSE-MsgGUID: w50G7nMtTS+Vgk7r3u1flw== X-IronPort-AV: E=McAfee;i="6700,10204,11215"; a="44789726" X-IronPort-AV: E=Sophos;i="6.11,178,1725346800"; d="scan'208";a="44789726" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Oct 2024 17:41:48 -0700 X-CSE-ConnectionGUID: SksO++2cRd68j/LoRPtwLQ== X-CSE-MsgGUID: SMgijH0JSquFU+8GigIYrA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,178,1725346800"; d="scan'208";a="74454309" Received: from lkp-server01.sh.intel.com (HELO a48cf1aa22e8) ([10.239.97.150]) by fmviesa006.fm.intel.com with ESMTP; 04 Oct 2024 17:41:47 -0700 Received: from kbuild by a48cf1aa22e8 with local (Exim 4.96) (envelope-from ) id 1swsrh-0002Nk-00; Sat, 05 Oct 2024 00:41:45 +0000 Date: Sat, 5 Oct 2024 08:41:08 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: drivers/iommu/amd/io_pgtable_v2.c:355 v2_free_pgtable() warn: can 'pgtable' even be NULL? Message-ID: <202410050801.g5aHqBpc-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 CC: linux-kernel@vger.kernel.org TO: Suravee Suthikulpanit CC: Joerg Roedel CC: Vasant Hegde CC: Jason Gunthorpe tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ac308609567d31fe44be80ab757a5ddf062362ef commit: e8e1aac33458d80545e5ad37b2a3e4243eee278e iommu/amd: Refactor helper function for setting / clearing GCR3 date: 8 months ago :::::: branch date: 5 hours ago :::::: commit date: 8 months ago config: x86_64-randconfig-161-20241005 (https://download.01.org/0day-ci/archive/20241005/202410050801.g5aHqBpc-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 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/202410050801.g5aHqBpc-lkp@intel.com/ smatch warnings: drivers/iommu/amd/io_pgtable_v2.c:355 v2_free_pgtable() warn: can 'pgtable' even be NULL? vim +/pgtable +355 drivers/iommu/amd/io_pgtable_v2.c aaac38f614871d Vasant Hegde 2022-08-25 350 aaac38f614871d Vasant Hegde 2022-08-25 351 static void v2_free_pgtable(struct io_pgtable *iop) aaac38f614871d Vasant Hegde 2022-08-25 352 { aaac38f614871d Vasant Hegde 2022-08-25 353 struct amd_io_pgtable *pgtable = container_of(iop, struct amd_io_pgtable, iop); aaac38f614871d Vasant Hegde 2022-08-25 354 e8e1aac33458d8 Suravee Suthikulpanit 2024-02-05 @355 if (!pgtable || !pgtable->pgd) aaac38f614871d Vasant Hegde 2022-08-25 356 return; aaac38f614871d Vasant Hegde 2022-08-25 357 aaac38f614871d Vasant Hegde 2022-08-25 358 /* Free page table */ aaac38f614871d Vasant Hegde 2022-08-25 359 free_pgtable(pgtable->pgd, get_pgtable_level()); e8e1aac33458d8 Suravee Suthikulpanit 2024-02-05 360 pgtable->pgd = NULL; aaac38f614871d Vasant Hegde 2022-08-25 361 } aaac38f614871d Vasant Hegde 2022-08-25 362 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki