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Use the sysfs_emit to replace sprintf. sprintf may cause output defect in sysfs content, it is better to use new added sysfs_emit function which knows the size of the temporary buffer. Signed-off-by: Kai Ye <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>