Justin Stitt [off-list ref] writes:

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 partition_name to be NUL-terminated based on its usage with
format strings:
|       dev_info(hostdata->dev, "host srp version: %s, "
|                "host partition %s (%d), OS %d, max io %u\n",
|                hostdata->madapter_info.srp_version,
|                hostdata->madapter_info.partition_name,
|                be32_to_cpu(hostdata->madapter_info.partition_number),
|                be32_to_cpu(hostdata->madapter_info.os_type),
|                be32_to_cpu(hostdata->madapter_info.port_max_txu[0]));
...
|       len = snprintf(buf, PAGE_SIZE, "%s\n",
|                hostdata->madapter_info.partition_name);

Moreover, NUL-padding is not required as madapter_info is explicitly
memset to 0:
|       memset(&hostdata->madapter_info, 0x00,
|                       sizeof(hostdata->madapter_info));

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.

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Justin Stitt <justinstitt@google.com>
---
Note: build-tested only.

I gave it a quick boot, no issues.

Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)

cheers