On Wed, Jul 04, 2018 at 12:48:01PM +0200, Håkon Bugge wrote:
> In cm_form_tid(), a two bit message sequence number is OR'ed into bit
> 31-30 of the lower TID value.
>
> After commit f06d26537559 ("IB/cm: Randomize starting comm ID"), the
> local_id is XOR'ed with a 32-bit random value. Hence, bit 31-30 in the
> lower TID now has an arbitrarily value and it makes no sense to OR in
> the message sequence number.
>
> Adding to that, the evolution in use of IDR routines in cm_alloc_id()
> has always had the possibility of returning a value with bit 30 set.
>
> In addition, said bits are never checked.
>
> Hence, remove the encoding and the corresponding enum.
>
> Signed-off-by: Håkon Bugge <haakon.bugge@xxxxxxxxxx>
> ---
> drivers/infiniband/core/cm.c | 14 ++++++--------
> drivers/infiniband/core/cm_msgs.h | 7 -------
> 2 files changed, 6 insertions(+), 15 deletions(-)
Applied to for-next, thanks
I suspect the bits were probably added long ago for debugging..
Jason
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