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 <selvin.xavier@broadcom.com>
Signed-off-by: Nicolas Morey <nmorey@suse.com>

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;