Depending on the state of @compatible, we are going to do different things with our @to buffer.
When @compatible is true we want a NUL-term'd and NUL-padded destination buffer. Conversely, if @compatible is false we just want a space-padded destination buffer (no NUL-term required). As per: /** * scsi_dev_info_list_add_keyed - add one dev_info list entry. * @compatible: if true, null terminate short strings. Otherwise space pad. ... Note that we can't easily use `strtomem_pad` here as the size of the @to buffer is unknown to the compiler due to indirection layers. Now, the intent of the code is more clear (I probably didn't even need to add a comment -- that's how clear it is). Signed-off-by: Justin Stitt <[email protected]> --- drivers/scsi/scsi_devinfo.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c index 3fcaf10a9dfe..2d3dbce25629 100644 --- a/drivers/scsi/scsi_devinfo.c +++ b/drivers/scsi/scsi_devinfo.c @@ -293,14 +293,16 @@ static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length, size_t from_length; from_length = strlen(from); - /* This zero-pads the destination */ - strncpy(to, from, to_length); - if (from_length < to_length && !compatible) { - /* - * space pad the string if it is short. - */ - memset(&to[from_length], ' ', to_length - from_length); - } + + /* + * null pad and null terminate if compatible + * otherwise space pad + */ + if (compatible) + strscpy_pad(to, from, to_length); + else + memcpy_and_pad(to, to_length, from, from_length, ' '); + if (from_length > to_length) printk(KERN_WARNING "%s: %s string '%s' is too long\n", __func__, name, from); -- 2.44.0.rc0.258.g7320e95886-goog
