From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (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 A881B1D5143 for ; Thu, 26 Dec 2024 11:30:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735212610; cv=none; b=JRcVfdtFsxnHi5IQLTFK99WS2RM1QcoFYoXkILFzHVQYDjhOoardL2w5TFymQtMWMMbDjrFfowdOg67OprSkOFfQ44LmKVU9xMnRT0mjstu9ut3gOLfIVII+A/AT3OaYDeakHsyrwbbgOk32Ikh33xv3FOib80hkIYV01J9ctTY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735212610; c=relaxed/simple; bh=fALPwc7oLcV7CBMDVM3v+DJ79wSZvWBQZtcHVM5pKq8=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=KA3BwDxxF98w9Mjpu5Z4uKcVFI5Du12oJ8Xs2aVeu993O7rEbdZzYmeQBbOT8Gi2ECU2EY8D+iZIHgeWpdg+YgXoAILvvi3w+3/LaKcU+m4RLhMzwqWX9k2MEMFoJiXE3XpOlrmC5dWfpV8nEkj6B5hXHS6sgLhBwaajuE19Ya8= 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=i/4Pi7+Y; arc=none smtp.client-ip=192.198.163.9 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="i/4Pi7+Y" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1735212609; x=1766748609; h=date:from:to:cc:subject:message-id:mime-version; bh=fALPwc7oLcV7CBMDVM3v+DJ79wSZvWBQZtcHVM5pKq8=; b=i/4Pi7+YNHpEXaZSrQRCwczeHP9m07H9sPc7OHuzb3nfY1VzNAhnR8vQ Vla+Qwo3c53O61+SeVHUx0qOrenXwPSbNj1G2OhBM/iiIbDVQK0oJpn5f CekrDHc8kUBjHIZKU3g9G5lAbFAaAUJJHm010cEuDmHr1QVuW87qcqe5h hSvOMX6+cnEkBH1rDf/6lTRjoLvVX9X9CQnqn2WrJ0aX+NtHLbcqn/oLZ xqFJqSUmFwS6KogLhQK0uvLXX5lf9CTR7khLFwFcmcq8yI+ZPOm46BCCB L7zmOyiavLBZj5kjh2OnwOMJNrbUgXAfC9w0SAGdceiCVHQTl6nDC0cnI A==; X-CSE-ConnectionGUID: bj39QMQzTOy9+wPH0azNKA== X-CSE-MsgGUID: QNQlENYOQFu4D1UD1BSIvQ== X-IronPort-AV: E=McAfee;i="6700,10204,11296"; a="46312049" X-IronPort-AV: E=Sophos;i="6.12,266,1728975600"; d="scan'208";a="46312049" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Dec 2024 03:30:08 -0800 X-CSE-ConnectionGUID: WPBeYLjdT9Wl8QrKuhz29A== X-CSE-MsgGUID: lcPYd62pTy2uVBihXITLAQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="137242440" Received: from lkp-server01.sh.intel.com (HELO d63d4d77d921) ([10.239.97.150]) by orviesa001.jf.intel.com with ESMTP; 26 Dec 2024 03:30:07 -0800 Received: from kbuild by d63d4d77d921 with local (Exim 4.96) (envelope-from ) id 1tQm44-0002Xo-1G; Thu, 26 Dec 2024 11:30:04 +0000 Date: Thu, 26 Dec 2024 19:29:28 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: drivers/gpio/gpio-davinci.c:599 davinci_gpio_save_context() error: potentially dereferencing uninitialized 'g'. Message-ID: <202412261936.Ab2roJgJ-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: Bartosz Golaszewski CC: Linus Walleij tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9b2ffa6148b1e4468d08f7e0e7e371c43cac9ffe commit: 56d6ff4b8faf1c2d5c850ed8b4e5dfa6cd81413b gpio: davinci: allow building the module with COMPILE_TEST=y date: 2 months ago :::::: branch date: 2 days ago :::::: commit date: 2 months ago config: sh-randconfig-r071-20241225 (https://download.01.org/0day-ci/archive/20241226/202412261936.Ab2roJgJ-lkp@intel.com/config) compiler: sh4-linux-gcc (GCC) 14.2.0 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/202412261936.Ab2roJgJ-lkp@intel.com/ smatch warnings: drivers/gpio/gpio-davinci.c:599 davinci_gpio_save_context() error: potentially dereferencing uninitialized 'g'. vim +/g +599 drivers/gpio/gpio-davinci.c 118150f22d6b44 KV Sujith 2013-08-18 577 0651a730924b17 Devarsh Thakkar 2022-06-13 578 static void davinci_gpio_save_context(struct davinci_gpio_controller *chips, 0651a730924b17 Devarsh Thakkar 2022-06-13 579 u32 nbank) 0651a730924b17 Devarsh Thakkar 2022-06-13 580 { 0651a730924b17 Devarsh Thakkar 2022-06-13 581 struct davinci_gpio_regs __iomem *g; 0651a730924b17 Devarsh Thakkar 2022-06-13 582 struct davinci_gpio_regs *context; 0651a730924b17 Devarsh Thakkar 2022-06-13 583 u32 bank; 0651a730924b17 Devarsh Thakkar 2022-06-13 584 void __iomem *base; 0651a730924b17 Devarsh Thakkar 2022-06-13 585 0651a730924b17 Devarsh Thakkar 2022-06-13 586 base = chips->regs[0] - offset_array[0]; 0651a730924b17 Devarsh Thakkar 2022-06-13 587 chips->binten_context = readl_relaxed(base + BINTEN); 0651a730924b17 Devarsh Thakkar 2022-06-13 588 0651a730924b17 Devarsh Thakkar 2022-06-13 589 for (bank = 0; bank < nbank; bank++) { 0651a730924b17 Devarsh Thakkar 2022-06-13 590 g = chips->regs[bank]; 0651a730924b17 Devarsh Thakkar 2022-06-13 591 context = &chips->context[bank]; 0651a730924b17 Devarsh Thakkar 2022-06-13 592 context->dir = readl_relaxed(&g->dir); 0651a730924b17 Devarsh Thakkar 2022-06-13 593 context->set_data = readl_relaxed(&g->set_data); 0651a730924b17 Devarsh Thakkar 2022-06-13 594 context->set_rising = readl_relaxed(&g->set_rising); 0651a730924b17 Devarsh Thakkar 2022-06-13 595 context->set_falling = readl_relaxed(&g->set_falling); 0651a730924b17 Devarsh Thakkar 2022-06-13 596 } 0651a730924b17 Devarsh Thakkar 2022-06-13 597 0651a730924b17 Devarsh Thakkar 2022-06-13 598 /* Clear all interrupt status registers */ 0651a730924b17 Devarsh Thakkar 2022-06-13 @599 writel_relaxed(GENMASK(31, 0), &g->intstat); 0651a730924b17 Devarsh Thakkar 2022-06-13 600 } 0651a730924b17 Devarsh Thakkar 2022-06-13 601 :::::: The code at line 599 was first introduced by commit :::::: 0651a730924b172476f67c7c6e01e898f84cd8f3 gpio: davinci: Add support for system suspend/resume PM :::::: TO: Devarsh Thakkar :::::: CC: Bartosz Golaszewski -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki