From the WWN of the HBA port, you can determine the controller number or the controller path. In this example, the HBA port WWN is 10000000c9722de0 (as in the previous section):
# fcinfo hba-port 10000000c9722de0 HBA Port WWN: 10000000c9722de0 Port Mode: Initiator Port ID: 10100 OS Device Name: /dev/cfg/c4 Manufacturer: Emulex Model: LPe11002-S Firmware Version: LPe11002-S 2.82a4 FCode/BIOS Version: Boot:5.02a1 Serial Number: 0999BG0-07500002OH Driver Name: emlxs Driver Version: 3.1.01.0 (2016.05.23.12.00) Type: N-port State: online Supported Speeds: 1Gb 2Gb 4Gb Current Speed: 4Gb Node WWN: 20000000c9722de0 NPIV Not Supported -bash-4.3#
The line labelled OS Device Name indicates that the controller number is 4 (the controller device path is /dev/cfg/c4).