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Since snprintf() has the documented, but still rather strange trait of returning the length of the data that *would have been* written to the array if space were available, rather than the arguably more useful length of data *actually* written, it is usually considered wise to use something else instead in order to avoid confusion. In the case of sysfs call-backs, new wrappers exist that do just that. Link: https://lwn.net/Articles/69419/ Link: https://github.com/KSPP/linux/issues/105 Cc: Alan Stern <stern@rowland.harvard.edu> Cc: <usb-storage@lists.one-eyed-alien.net> Signed-off-by: Lee Jones <lee@kernel.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Link: https://lore.kernel.org/r/20231213164246.1021885-13-lee@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>