iio: core: Use sysfs_emit() (trivial bits)
sysfs_emit() is preferred over raw s*printf() for sysfs attributes since it knows about the sysfs buffer specifics and has some built-in sanity checks. This patch converts the places in the iio core that follow the pattern of return s*printf(...) to return sysfs_emit(...) Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Link: https://lore.kernel.org/r/20210320071405.9347-2-lars@metafoo.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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