bnxt_re/lib: Fix the stride calculation for MSN/PSN area

[ Upstream commit 65197a4 ] Library expects ilog2 of psn_size while calculating the stride. ilog32 returns log2(v) + 1 and the calculation fails since the psn size is a power of 2 value. Fix by passing psn_size - 1. Fixes: 0a0e0d0 ("bnxt_re/lib: Adds MSN table capability for Gen P7 adapters") Signed-off-by: Selvin Xavier <[email protected]> Signed-off-by: Nicolas Morey <[email protected]>
linux-rdma · May 27, 2024 · 336e55b · 336e55b
1 parent 1426311
commit 336e55b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/providers/bnxt_re/verbs.c b/providers/bnxt_re/verbs.c
@@ -1236,7 +1236,7 @@ static int bnxt_re_alloc_queues(struct bnxt_re_context *cntx,
  /* psn_depth extra entries of size que->stride */
  psn_size = bnxt_re_get_psne_size(qp->cntx);
  psn_depth = (nswr * psn_size) / que->stride;
- que->pad_stride_log2 = (uint32_t)ilog32(psn_size);
+ que->pad_stride_log2 = ilog32(psn_size - 1);
  if ((nswr * psn_size) % que->stride)
  psn_depth++;
  que->depth += psn_depth;