linux-kernel - Re: [PATCH v5 10/10] iio: accel: adxl345: add FIFO with watermark events

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <dc914326-7eae-4e4a-8c93-ae1a7007bcc9@stanley.mountain>
Date: Tue, 10 Dec 2024 11:47:37 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: oe-kbuild@...ts.linux.dev, Lothar Rubusch <l.rubusch@...il.com>,
	lars@...afoo.de, Michael.Hennerich@...log.com, jic23@...nel.org,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
	devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org, eraretuya@...il.com,
	l.rubusch@...il.com
Subject: Re: [PATCH v5 10/10] iio: accel: adxl345: add FIFO with watermark
 events

Hi Lothar,

kernel test robot noticed the following build warnings:

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Lothar-Rubusch/iio-accel-adxl345-refrase-comment-on-probe/20241206-011802
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20241205171343.308963-11-l.rubusch%40gmail.com
patch subject: [PATCH v5 10/10] iio: accel: adxl345: add FIFO with watermark events
config: nios2-randconfig-r072-20241210 (https://download.01.org/0day-ci/archive/20241210/202412101132.Kj6R6i3h-lkp@intel.com/config)
compiler: nios2-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 <lkp@...el.com>
| Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
| Closes: https://lore.kernel.org/r/202412101132.Kj6R6i3h-lkp@intel.com/

smatch warnings:
drivers/iio/accel/adxl345_core.c:441 adxl345_event_handler() warn: unsigned 'int_stat' is never less than zero.

vim +/ret +321 drivers/iio/accel/adxl345_core.c

55d2386488598bb Lothar Rubusch 2024-12-05  433  static irqreturn_t adxl345_event_handler(int irq, void *p)
55d2386488598bb Lothar Rubusch 2024-12-05  434  {
55d2386488598bb Lothar Rubusch 2024-12-05  435  	struct iio_dev *indio_dev = p;
55d2386488598bb Lothar Rubusch 2024-12-05  436  	struct adxl345_state *st = iio_priv(indio_dev);
55d2386488598bb Lothar Rubusch 2024-12-05  437  	u8 int_stat;
                                                        ^^^^^^^^^^^

55d2386488598bb Lothar Rubusch 2024-12-05  438  	int samples;
55d2386488598bb Lothar Rubusch 2024-12-05  439  
55d2386488598bb Lothar Rubusch 2024-12-05  440  	int_stat = adxl345_get_status(st);
55d2386488598bb Lothar Rubusch 2024-12-05 @441  	if (int_stat < 0)
                                                            ^^^^^^^^^^^^
signedness bug

55d2386488598bb Lothar Rubusch 2024-12-05  442  		return IRQ_NONE;
55d2386488598bb Lothar Rubusch 2024-12-05  443  
55d2386488598bb Lothar Rubusch 2024-12-05  444  	if (int_stat == 0x0)
55d2386488598bb Lothar Rubusch 2024-12-05  445  		goto err;
55d2386488598bb Lothar Rubusch 2024-12-05  446  
55d2386488598bb Lothar Rubusch 2024-12-05  447  	if (int_stat & ADXL345_INT_OVERRUN)
55d2386488598bb Lothar Rubusch 2024-12-05  448  		goto err;
55d2386488598bb Lothar Rubusch 2024-12-05  449  
55d2386488598bb Lothar Rubusch 2024-12-05  450  	if (int_stat & (ADXL345_INT_DATA_READY | ADXL345_INT_WATERMARK)) {
55d2386488598bb Lothar Rubusch 2024-12-05  451  		samples = adxl345_get_samples(st);
55d2386488598bb Lothar Rubusch 2024-12-05  452  		if (samples < 0)
55d2386488598bb Lothar Rubusch 2024-12-05  453  			goto err;
55d2386488598bb Lothar Rubusch 2024-12-05  454  
55d2386488598bb Lothar Rubusch 2024-12-05  455  		if (adxl345_fifo_push(indio_dev, samples) < 0)
55d2386488598bb Lothar Rubusch 2024-12-05  456  			goto err;
55d2386488598bb Lothar Rubusch 2024-12-05  457  
55d2386488598bb Lothar Rubusch 2024-12-05  458  	}
55d2386488598bb Lothar Rubusch 2024-12-05  459  	return IRQ_HANDLED;
55d2386488598bb Lothar Rubusch 2024-12-05  460  
55d2386488598bb Lothar Rubusch 2024-12-05  461  err:
55d2386488598bb Lothar Rubusch 2024-12-05  462  	adxl345_fifo_reset(st);
55d2386488598bb Lothar Rubusch 2024-12-05  463  
55d2386488598bb Lothar Rubusch 2024-12-05  464  	return IRQ_HANDLED;
55d2386488598bb Lothar Rubusch 2024-12-05  465  }

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki