strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
We expect wl->chip.fw_ver_str to be NUL-terminated based on its usage
with DRIVER_STATE_PRINT_STR() in debugfs.c:
491 | DRIVER_STATE_PRINT_STR(chip.fw_ver_str);
... which uses DRIVER_STATE_PRINT():
444 | #define DRIVER_STATE_PRINT_STR(x) DRIVER_STATE_PRINT(x, "%s")
... which relies on scnprintf:
434 | #define DRIVER_STATE_PRINT(x, fmt) \
435 | (res += scnprintf(buf + res, DRIVER_STATE_BUF_LEN - res,\
436 | #x " = " fmt "\n", wl->x))
Moreover, NUL-padding is not required.
Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.