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Message-ID: <202410150702.UaZ7kvet-lkp@intel.com>
Date: Tue, 15 Oct 2024 07:52:50 +0800
From: kernel test robot <lkp@...el.com>
To: Tao Zhang <quic_taozha@...cinc.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Suzuki K Poulose <suzuki.poulose@....com>
Subject: drivers/hwtracing/coresight/coresight-tpdm.c:288 dsb_mode_store()
warn: unsigned 'val' is never less than zero.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: eca631b8fe808748d7585059c4307005ca5c5820
commit: 018e43ad1eeefbb8797e4c933953c50c09e3f4f6 coresight-tpdm: Add node to set dsb programming mode
date: 11 months ago
config: arm-randconfig-r073-20241015 (https://download.01.org/0day-ci/archive/20241015/202410150702.UaZ7kvet-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.1.0
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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410150702.UaZ7kvet-lkp@intel.com/
smatch warnings:
drivers/hwtracing/coresight/coresight-tpdm.c:288 dsb_mode_store() warn: unsigned 'val' is never less than zero.
vim +/val +288 drivers/hwtracing/coresight/coresight-tpdm.c
279
280 static ssize_t dsb_mode_store(struct device *dev,
281 struct device_attribute *attr,
282 const char *buf,
283 size_t size)
284 {
285 struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
286 unsigned long val;
287
> 288 if ((kstrtoul(buf, 0, &val)) || (val < 0) ||
289 (val & ~TPDM_DSB_MODE_MASK))
290 return -EINVAL;
291
292 spin_lock(&drvdata->spinlock);
293 drvdata->dsb->mode = val & TPDM_DSB_MODE_MASK;
294 spin_unlock(&drvdata->spinlock);
295 return size;
296 }
297 static DEVICE_ATTR_RW(dsb_mode);
298
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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