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X-CSE-ConnectionGUID: ocFqswJrQvewtvqYAPu+Bw== X-CSE-MsgGUID: IVxvjvReTuKapDEoYdSJZw== X-IronPort-AV: E=McAfee;i="6800,10657,11900"; a="76977128" X-IronPort-AV: E=Sophos;i="6.25,270,1779174000"; d="scan'208";a="76977128" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Sep 2026 12:06:26 -0700 X-CSE-ConnectionGUID: +Xxt1i24TSCh5HQXgYinqA== X-CSE-MsgGUID: jjoz/XkXQ6mY2eF6i13WKw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,270,1779174000"; d="scan'208";a="276646363" Received: from lkp-server01.sh.intel.com (HELO a3e91e2cf319) ([10.239.97.150]) by fmviesa005.fm.intel.com with ESMTP; 09 Sep 2026 12:06:25 -0700 Received: from kbuild by a3e91e2cf319 with local (Exim 4.98.2) (envelope-from ) id 1x4Ncl-000000000pI-1Dzl; Wed, 09 Sep 2026 19:06:23 +0000 Date: Thu, 10 Sep 2026 03:05:27 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: [frank-w-bpi-r2-4.14:7.2-main 213/213] drivers/tty/serial/8250/8250_mtk.c:437 mtk8250_runtime_suspend() warn: test_and_clear_bit() takes a bit number Message-ID: <202609100256.0onKHOy1-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev TO: Frank Wunderlich tree: https://github.com/frank-w/BPI-R2-4.14 7.2-main head: e2b8c6a7a01daa29f0109ecfd5d0fa93e27da8bf commit: 6f53f04819bff1609acb1655c95238965736452b [213/213] serial: 8250_mtk: track busclk state to avoid bus error :::::: branch date: 3 days ago :::::: commit date: 11 days ago config: loongarch-randconfig-r073-20260910 (https://download.01.org/0day-ci/archive/20260910/202609100256.0onKHOy1-lkp@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 16.1.0 smatch: v0.5.0-9187-g5189e3fb 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/202609100256.0onKHOy1-lkp@intel.com/ New smatch warnings: drivers/tty/serial/8250/8250_mtk.c:437 mtk8250_runtime_suspend() warn: test_and_clear_bit() takes a bit number drivers/tty/serial/8250/8250_mtk.c:454 mtk8250_runtime_resume() warn: test_and_set_bit() takes a bit number Old smatch warnings: arch/loongarch/include/asm/atomic.h:51 arch_atomic_fetch_add_unless() warn: inconsistent indenting vim +437 drivers/tty/serial/8250/8250_mtk.c b4756f4f0d773c Matthias Brugger 2014-09-09 431 9db669f14fd829 Arnd Bergmann 2016-02-08 432 static int __maybe_unused mtk8250_runtime_suspend(struct device *dev) 68e5fc4a255a7f Sascha Hauer 2015-04-27 433 { 68e5fc4a255a7f Sascha Hauer 2015-04-27 434 struct mtk8250_data *data = dev_get_drvdata(dev); e32a83c70cf987 Changqi Hu 2020-02-26 435 struct uart_8250_port *up = serial8250_get_port(data->line); 68e5fc4a255a7f Sascha Hauer 2015-04-27 436 6f53f04819bff1 Daniel Golle 2023-09-11 @437 if (!test_and_clear_bit(MTK_UART_STATE_BIT_BUSCLK_EN, &data->state)) 6f53f04819bff1 Daniel Golle 2023-09-11 438 return 0; 6f53f04819bff1 Daniel Golle 2023-09-11 439 e32a83c70cf987 Changqi Hu 2020-02-26 440 /* wait until UART in idle status */ e32a83c70cf987 Changqi Hu 2020-02-26 441 while e32a83c70cf987 Changqi Hu 2020-02-26 442 (serial_in(up, MTK_UART_DEBUG0)); e32a83c70cf987 Changqi Hu 2020-02-26 443 d518314a1fa4e9 Daniel Golle 2025-09-16 444 clk_disable_unprepare(data->uart_clk); c1c325d703d347 Sascha Hauer 2015-04-27 445 clk_disable_unprepare(data->bus_clk); 68e5fc4a255a7f Sascha Hauer 2015-04-27 446 68e5fc4a255a7f Sascha Hauer 2015-04-27 447 return 0; 68e5fc4a255a7f Sascha Hauer 2015-04-27 448 } 68e5fc4a255a7f Sascha Hauer 2015-04-27 449 9db669f14fd829 Arnd Bergmann 2016-02-08 450 static int __maybe_unused mtk8250_runtime_resume(struct device *dev) 68e5fc4a255a7f Sascha Hauer 2015-04-27 451 { 68e5fc4a255a7f Sascha Hauer 2015-04-27 452 struct mtk8250_data *data = dev_get_drvdata(dev); 68e5fc4a255a7f Sascha Hauer 2015-04-27 453 6f53f04819bff1 Daniel Golle 2023-09-11 @454 if (test_and_set_bit(MTK_UART_STATE_BIT_BUSCLK_EN, &data->state)) 6f53f04819bff1 Daniel Golle 2023-09-11 455 return 0; 6f53f04819bff1 Daniel Golle 2023-09-11 456 b6c7ff2693ddc2 Chen-Yu Tsai 2023-06-06 457 clk_prepare_enable(data->bus_clk); d518314a1fa4e9 Daniel Golle 2025-09-16 458 clk_prepare_enable(data->uart_clk); c1c325d703d347 Sascha Hauer 2015-04-27 459 68e5fc4a255a7f Sascha Hauer 2015-04-27 460 return 0; 68e5fc4a255a7f Sascha Hauer 2015-04-27 461 } 68e5fc4a255a7f Sascha Hauer 2015-04-27 462 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f47.google.com (mail-wr1-f47.google.com [209.85.221.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2F5B43C199B for ; Wed, 9 Sep 2026 19:48:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Wed, 09 Sep 2026 12:48:08 -0700 (PDT) Received: from localhost ([2c0f:3d00:6be:8900:ce5e:9212:ea4b:f30]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48588135600sm40528235f8f.2.2026.09.09.12.48.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 12:48:07 -0700 (PDT) Date: Wed, 9 Sep 2026 22:48:02 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Frank Wunderlich Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev Subject: [frank-w-bpi-r2-4.14:7.2-main 213/213] drivers/tty/serial/8250/8250_mtk.c:437 mtk8250_runtime_suspend() warn: test_and_clear_bit() takes a bit number Message-ID: <202609100256.0onKHOy1-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 Message-ID: <20260909194802.psKhmOkNRo9U9i8j-PNghrqGPChTk6ArleBGfBWcnkc@z> tree: https://github.com/frank-w/BPI-R2-4.14 7.2-main head: e2b8c6a7a01daa29f0109ecfd5d0fa93e27da8bf commit: 6f53f04819bff1609acb1655c95238965736452b [213/213] serial: 8250_mtk: track busclk state to avoid bus error config: loongarch-randconfig-r073-20260910 (https://download.01.org/0day-ci/archive/20260910/202609100256.0onKHOy1-lkp@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 16.1.0 smatch: v0.5.0-9187-g5189e3fb 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/202609100256.0onKHOy1-lkp@intel.com/ New smatch warnings: drivers/tty/serial/8250/8250_mtk.c:437 mtk8250_runtime_suspend() warn: test_and_clear_bit() takes a bit number drivers/tty/serial/8250/8250_mtk.c:454 mtk8250_runtime_resume() warn: test_and_set_bit() takes a bit number vim +437 drivers/tty/serial/8250/8250_mtk.c 9db669f14fd829 Arnd Bergmann 2016-02-08 432 static int __maybe_unused mtk8250_runtime_suspend(struct device *dev) 68e5fc4a255a7f Sascha Hauer 2015-04-27 433 { 68e5fc4a255a7f Sascha Hauer 2015-04-27 434 struct mtk8250_data *data = dev_get_drvdata(dev); e32a83c70cf987 Changqi Hu 2020-02-26 435 struct uart_8250_port *up = serial8250_get_port(data->line); 68e5fc4a255a7f Sascha Hauer 2015-04-27 436 6f53f04819bff1 Daniel Golle 2023-09-11 @437 if (!test_and_clear_bit(MTK_UART_STATE_BIT_BUSCLK_EN, &data->state)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ double BIT(BIT()) bug. 6f53f04819bff1 Daniel Golle 2023-09-11 438 return 0; 6f53f04819bff1 Daniel Golle 2023-09-11 439 e32a83c70cf987 Changqi Hu 2020-02-26 440 /* wait until UART in idle status */ e32a83c70cf987 Changqi Hu 2020-02-26 441 while e32a83c70cf987 Changqi Hu 2020-02-26 442 (serial_in(up, MTK_UART_DEBUG0)); e32a83c70cf987 Changqi Hu 2020-02-26 443 d518314a1fa4e9 Daniel Golle 2025-09-16 444 clk_disable_unprepare(data->uart_clk); c1c325d703d347 Sascha Hauer 2015-04-27 445 clk_disable_unprepare(data->bus_clk); 68e5fc4a255a7f Sascha Hauer 2015-04-27 446 68e5fc4a255a7f Sascha Hauer 2015-04-27 447 return 0; 68e5fc4a255a7f Sascha Hauer 2015-04-27 448 } 68e5fc4a255a7f Sascha Hauer 2015-04-27 449 9db669f14fd829 Arnd Bergmann 2016-02-08 450 static int __maybe_unused mtk8250_runtime_resume(struct device *dev) 68e5fc4a255a7f Sascha Hauer 2015-04-27 451 { 68e5fc4a255a7f Sascha Hauer 2015-04-27 452 struct mtk8250_data *data = dev_get_drvdata(dev); 68e5fc4a255a7f Sascha Hauer 2015-04-27 453 6f53f04819bff1 Daniel Golle 2023-09-11 @454 if (test_and_set_bit(MTK_UART_STATE_BIT_BUSCLK_EN, &data->state)) 6f53f04819bff1 Daniel Golle 2023-09-11 455 return 0; 6f53f04819bff1 Daniel Golle 2023-09-11 456 b6c7ff2693ddc2 Chen-Yu Tsai 2023-06-06 457 clk_prepare_enable(data->bus_clk); d518314a1fa4e9 Daniel Golle 2025-09-16 458 clk_prepare_enable(data->uart_clk); c1c325d703d347 Sascha Hauer 2015-04-27 459 68e5fc4a255a7f Sascha Hauer 2015-04-27 460 return 0; 68e5fc4a255a7f Sascha Hauer 2015-04-27 461 } 68e5fc4a255a7f Sascha Hauer 2015-04-27 462 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki