On Wed, May 05, 2021 at 02:54:01PM +0200, Håkon Bugge wrote:
> There are three conditions that must be fulfilled in order to consider
> a partition match. Those are:
>
> 1. Both P_Keys must valid
> 2. At least one must be a full member
> 3. The partitions (lower 15 bits) must match
>
> In system employing both limited and full membership ports, we see
> these false warning messages:
>
> RDMA CMA: got different BTH P_Key (0x2a00) and primary path P_Key (0xaa00)
> RDMA CMA: in the future this may cause the request to be dropped
>
> even though the partition is the same.
>
> See IBTA 10.9.1.2 Special P_Keys and 10.9.3 Partition Key Matching for
> a reference.
>
> Fixes: 84424a7fc793 ("IB/cma: Print warning on different inner and header P_Keys")
> Signed-off-by: Håkon Bugge <haakon.bugge@xxxxxxxxxx>
> ---
> drivers/infiniband/core/cma.c | 22 ++++++++++++++++++++--
> 1 file changed, 20 insertions(+), 2 deletions(-)
What is this trying to fix?
IMHO it is a bug on the sender side to send GMPs to use a pkey that
doesn't exactly match the data path pkey.
Jason
