[ofa-general] [PATCH] libmlx4: Adjust ownership bit properly in resize_cq when copying over CQEs

[Jack Morgenstein]

During resize_cq, when copying over unpolled CQEs from the old CQE buffer to
the new buffer, the ownership bit must be set appropriately for the new buffer,
or the ownership bit in the new buffer gets corrupted.

Signed-off-by: Jack Morgenstein <jackm at dev.mellanox.co.il>

Index: libmlx4/src/cq.c
===================================================================
--- libmlx4.orig/src/cq.c	2008-11-20 11:46:58.000000000 +0200
+++ libmlx4/src/cq.c	2008-12-14 18:10:41.000000000 +0200
@@ -455,6 +455,8 @@ void mlx4_cq_resize_copy_cqes(struct mlx
 	cqe = get_cqe(cq, (i & old_cqe));
 
 	while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) {
+		cqe->owner_sr_opcode = (cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK) |
+			(((i + 1) & (cq->ibv_cq.cqe + 1)) ? MLX4_CQE_OWNER_MASK : 0);
 		memcpy(buf + ((i + 1) & cq->ibv_cq.cqe) * MLX4_CQ_ENTRY_SIZE,
 		       cqe, MLX4_CQ_ENTRY_SIZE);
 		++i;