From: Andrew Rybchenko <arybchenko@solarflare.com>
Date: Mon, 19 Mar 2018 07:50:11 +0000 (+0000)
Subject: net/sfc: fix mbuf data alignment calculation
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=bd0c7b4d76783484e1600ec34b0dae2c5d9ef57b;p=dpdk.git

net/sfc: fix mbuf data alignment calculation

Unlike ffs() rte_bsf32() counts bit position from 0.

Fixes: 0c7a0c35f24c ("net/sfc: calculate Rx buffer size which may be used")
Cc: stable@dpdk.org

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---

diff --git a/drivers/net/sfc/sfc_rx.c b/drivers/net/sfc/sfc_rx.c
index f7aaab0705..2478a15659 100644
--- a/drivers/net/sfc/sfc_rx.c
+++ b/drivers/net/sfc/sfc_rx.c
@@ -887,7 +887,7 @@ sfc_rx_mbuf_data_alignment(struct rte_mempool *mb_pool)
 
 	order = MIN(order, rte_bsf32(data_off));
 
-	return 1u << (order - 1);
+	return 1u << order;
 }
 
 static uint16_t