| Message ID | 20190109192233.5752-7-logang@deltatee.com |
|---|---|
| State | In Next |
| Commit | 6d4b0c2a45eac80abbd1a376caef7b595f6ab2be |
| Headers | show |
| Series |
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| Related | show |
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c index bd0474e62a40..7165f7ab8e35 100644 --- a/drivers/ntb/test/ntb_perf.c +++ b/drivers/ntb/test/ntb_perf.c @@ -1417,6 +1417,16 @@ static int perf_init_peers(struct perf_ctx *perf) if (perf->gidx == -1) perf->gidx = pidx; + /* + * Hardware with only two ports may not have unique port + * numbers. In this case, the gidxs should all be zero. + */ + if (perf->pcnt == 1 && ntb_port_number(perf->ntb) == 0 && + ntb_peer_port_number(perf->ntb, 0) == 0) { + perf->gidx = 0; + perf->peers[0].gidx = 0; + } + for (pidx = 0; pidx < perf->pcnt; pidx++) { ret = perf_setup_peer_mw(&perf->peers[pidx]); if (ret)
Legacy drivers do not have port numbers (but is reliably only two ports) and was broken by the recent commit that added mult-port support to ntb_perf. This is especially important to support the cross link topology which is perfectly symmetric and cannot assign unique port numbers easily. Hardware that returns zero for both the local port and the peer should just always use gidx=0 for the only peer. Fixes: 5648e56d03fa ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <allenbh@gmail.com> Tested-by: Alexander Fomichev <fomichev.ru@gmail.com> --- drivers/ntb/test/ntb_perf.c | 10 ++++++++++ 1 file changed, 10 insertions(+)