tree:
https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.9
head: aa9f1bc6b4d5d72c1f760e733b504a8a1bdd096f
commit: 6d6b3333319ff8bd6bafa09b1b495bc5822d19c8 [41/55] iio:magnetometer:ak8974: Fix
alignment and data leak issues
config: x86_64-randconfig-s022-20200717 (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.2-49-g707c5017-dirty
git checkout 6d6b3333319ff8bd6bafa09b1b495bc5822d19c8
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
sparse warnings: (new ones prefixed by >>)
drivers/iio/magnetometer/ak8974.c:408:16: sparse: sparse: cast to restricted __le16
drivers/iio/magnetometer/ak8974.c:485:29: sparse: sparse: cast to restricted __le16
> drivers/iio/magnetometer/ak8974.c:511:40: sparse: sparse:
incorrect type in argument 2 (different base types) @@ expected signed short
[usertype] *result @@ got restricted __le16 * @@
> drivers/iio/magnetometer/ak8974.c:511:40: sparse: expected signed short
[usertype] *result
> drivers/iio/magnetometer/ak8974.c:511:40: sparse: got restricted __le16 *
vim +511 drivers/iio/magnetometer/ak8974.c
497
498 static void ak8974_fill_buffer(struct iio_dev *indio_dev)
499 {
500 struct ak8974 *ak8974 = iio_priv(indio_dev);
501 int ret;
502
503 pm_runtime_get_sync(&ak8974->i2c->dev);
504 mutex_lock(&ak8974->lock);
505
506 ret = ak8974_trigmeas(ak8974);
507 if (ret) {
508 dev_err(&ak8974->i2c->dev, "error triggering measure\n");
509 goto out_unlock;
510 }
511 ret = ak8974_getresult(ak8974, ak8974->scan.channels);
512 if (ret) {
513 dev_err(&ak8974->i2c->dev, "error getting measures\n");
514 goto out_unlock;
515 }
516
517 iio_push_to_buffers_with_timestamp(indio_dev, &ak8974->scan,
518 iio_get_time_ns(indio_dev));
519
520 out_unlock:
521 mutex_unlock(&ak8974->lock);
522 pm_runtime_mark_last_busy(&ak8974->i2c->dev);
523 pm_runtime_put_autosuspend(&ak8974->i2c->dev);
524 }
525
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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org