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Commit bd8031b4 authored by Hal Rosenstock's avatar Hal Rosenstock Committed by Roland Dreier
Browse files

IB/umad: Clarify documentation of transaction ID 



Signed-off-by: default avatarHal Rosenstock <halr@voltaire.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 37aebbde

Documentation/infiniband/user_mad.txt

+8 −0
Original line number Diff line number Diff line
@@ -91,6 +91,14 @@ Sending MADs 
	if (ret != sizeof *mad + mad_length)

		perror("write");



Transaction IDs



  Users of the umad devices can use the lower 32 bits of the

  transaction ID field (that is, the least significant half of the

  field in network byte order) in MADs being sent to match

  request/response pairs.  The upper 32 bits are reserved for use by

  the kernel and will be overwritten before a MAD is sent.



Setting IsSM Capability Bit



  To set the IsSM capability bit for a port, simply open the