[dpdk-dev] [PATCH] net/octeontx2: fix buffer size assignment

[Ankur Dwivedi <adwivedi@marvell.com>]

The elt_size field in mempool holds the size of one packet buffer.
It can be used to set the lpm_sizem1 field in rq context.

The lpb_sizem1 field in rq context is 12 bit, direct assignment
to it was causing overflow of value. Because of this errors
were observed while trying inline inbound with large packets.
This patch resolves the errors.

Fixes: 094fc8a3a1e2 ("net/octeontx2: add Rx queue setup and release")

Signed-off-by: Ankur Dwivedi <adwivedi@marvell.com>
Reviewed-by: Nithin Kumar Dabilpuram <ndabilpuram@marvell.com>
Reviewed-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
---
 drivers/net/octeontx2/otx2_ethdev.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index 3116e5c..3f3f0a6 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -373,10 +373,7 @@
 	aq->rq.first_skip = first_skip;
 	aq->rq.later_skip = (sizeof(struct rte_mbuf) / 8);
 	aq->rq.flow_tagw = 32; /* 32-bits */
-	aq->rq.lpb_sizem1 = rte_pktmbuf_data_room_size(mp);
-	aq->rq.lpb_sizem1 += rte_pktmbuf_priv_size(mp);
-	aq->rq.lpb_sizem1 += sizeof(struct rte_mbuf);
-	aq->rq.lpb_sizem1 /= 8;
+	aq->rq.lpb_sizem1 = mp->elt_size / 8;
 	aq->rq.lpb_sizem1 -= 1; /* Expressed in size minus one */
 	aq->rq.ena = 1;
 	aq->rq.pb_caching = 0x2; /* First cache aligned block to LLC */
-- 
1.9.3