multipath-tools: Fix rtpg buffer length calculation
multipath-tools: Fix rtpg buffer length calculation

Since you use scsi_buflen to allocate the correct size for the
SCSI RTPG request buffer, You need to have the "+4" in its
calculation, not just in the check to see if the request buffer is
already big enough, otherwise, you'll fail the check, but you
won't allocate a new buffer that is big enough.

Signed-off-by: Benjamin Marzinski <6b0cc3f70b3cc4298c6f98f9a6292b5ebe631572@redhat.com>

vijaychauhan/multipath-tools,vijaychauhan/multipath-tools,unakatsuo/multipath-tools,gebi/multipath-tools,unakatsuo/multipath-tools,unakatsuo/multipath-tools,grzn/multipath-tools-explained,grzn/multipath-tools-explained