Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR (net-7.0-rc7).

Conflicts:

net/vmw_vsock/af_vsock.c
  b18c83388874 ("vsock: initialize child_ns_mode_locked in vsock_net_init()")
  0de607dc4fd8 ("vsock: add G2H fallback for CIDs not owned by H2G transport")

Adjacent changes:

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
  ceee35e5674a ("bnxt_en: Refactor some basic ring setup and adjustment logic")
  57cdfe0dc70b ("bnxt_en: Resize RSS contexts on channel count change")

drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
  4d56037a02bd ("wifi: iwlwifi: mld: block EMLSR during TDLS connections")
  687a95d204e7 ("wifi: iwlwifi: mld: correctly set wifi generation data")

drivers/net/wireless/intel/iwlwifi/mld/scan.h
  b6045c899e37 ("wifi: iwlwifi: mld: Refactor scan command handling")
  ec66ec6a5a8f ("wifi: iwlwifi: mld: Fix MLO scan timing")

drivers/net/wireless/intel/iwlwifi/mvm/fw.c
  078df640ef05 ("wifi: iwlwifi: mld: add support for iwl_mcc_allowed_ap_type_cmd v
2")
  323156c3541e ("wifi: iwlwifi: mvm: don't send a 6E related command when not supported")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 27 insertions, 10 deletions

diff --git a/drivers/infiniband/core/rw.c b/drivers/infiniband/core/rw.c
index fc45c384833f..4fafe393a48c 100644
--- a/drivers/infiniband/core/rw.c
+++ b/drivers/infiniband/core/rw.c
@@ -608,14 +608,29 @@ int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num,
 	if (rdma_rw_io_needs_mr(qp->device, port_num, dir, sg_cnt)) {
 		ret = rdma_rw_init_mr_wrs(ctx, qp, port_num, sg, sg_cnt,
 				sg_offset, remote_addr, rkey, dir);
-	} else if (sg_cnt > 1) {
+		/*
+		 * If MR init succeeded or failed for a reason other
+		 * than pool exhaustion, that result is final.
+		 *
+		 * Pool exhaustion (-EAGAIN) from the max_sgl_rd
+		 * optimization is recoverable: fall back to
+		 * direct SGE posting. iWARP and force_mr require
+		 * MRs unconditionally, so -EAGAIN is terminal.
+		 */
+		if (ret != -EAGAIN ||
+		    rdma_protocol_iwarp(qp->device, port_num) ||
+		    unlikely(rdma_rw_force_mr))
+			goto out;
+	}
+
+	if (sg_cnt > 1)
 		ret = rdma_rw_init_map_wrs(ctx, qp, sg, sg_cnt, sg_offset,
 				remote_addr, rkey, dir);
-	} else {
+	else
 		ret = rdma_rw_init_single_wr(ctx, qp, sg, sg_offset,
 				remote_addr, rkey, dir);
-	}
 
+out:
 	if (ret < 0)
 		goto out_unmap_sg;
 	return ret;
@@ -686,14 +701,16 @@ int rdma_rw_ctx_init_bvec(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
 		return ret;
 
 	/*
-	 * IOVA mapping not available. Check if MR registration provides
-	 * better performance than multiple SGE entries.
+	 * IOVA not available; fall back to the map_wrs path, which maps
+	 * each bvec as a direct SGE. This is always correct: the MR path
+	 * is a throughput optimization, not a correctness requirement.
+	 * (iWARP, which does require MRs, is handled by the check above.)
+	 *
+	 * The rdma_rw_io_needs_mr() gate is not used here because nr_bvec
+	 * is a raw page count that overstates DMA entry demand -- the bvec
+	 * caller has no post-DMA-coalescing segment count, and feeding the
+	 * inflated count into the MR path exhausts the pool on RDMA READs.
 	 */
-	if (rdma_rw_io_needs_mr(dev, port_num, dir, nr_bvec))
-		return rdma_rw_init_mr_wrs_bvec(ctx, qp, port_num, bvecs,
-						nr_bvec, &iter, remote_addr,
-						rkey, dir);
-
 	return rdma_rw_init_map_wrs_bvec(ctx, qp, bvecs, nr_bvec, &iter,
 			remote_addr, rkey, dir);
 }