Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7f446abf authored by Steve Wise's avatar Steve Wise Committed by Doug Ledford
Browse files

iw_cxgb4: limit IRD/ORD advertised to ULP by device max. 



The i40iw initiator sends an MPA-request with ird = 63, ord = 63. The
cxgb4 responder sends a RST.  Since the inbound ord=63 and it exceeds
the max_ird/c4iw_max_read_depth (=32 default), chelsio decides to abort.

Instead, cxgb4 should adjust the ord/ird down before presenting it to
the ULP.

Reported-by: default avatarShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent e0cf75de

drivers/infiniband/hw/cxgb4/cm.c

+4 −0
Original line number Diff line number Diff line
@@ -1827,8 +1827,12 @@ static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) 
				(ep->mpa_pkt + sizeof(*mpa));

			ep->ird = ntohs(mpa_v2_params->ird) &

				MPA_V2_IRD_ORD_MASK;

			ep->ird = min_t(u32, ep->ird,

					cur_max_read_depth(ep->com.dev));

			ep->ord = ntohs(mpa_v2_params->ord) &

				MPA_V2_IRD_ORD_MASK;

			ep->ord = min_t(u32, ep->ord,

					cur_max_read_depth(ep->com.dev));

			PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,

			     ep->ord);

			if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)