From:   Ratheesh Kannoth <rkannoth@marvell.com>
To:     <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
        <pabeni@redhat.com>, <leon@kernel.org>
CC:     <sgoutham@marvell.com>, Ratheesh Kannoth <rkannoth@marvell.com>
Subject: [net PATCH v1] octeontx2-af: Fix start and end bit for scan config
Date:   Thu, 2 Mar 2023 09:40:18 +0530
Message-ID: <20230302041018.885758-1-rkannoth@marvell.com>
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Precedence: bulk

for_each_set_bit_from() needs start bit as one bit prior
and end bit as one bit post position in the bit map

Fixes: 812103edf670 (octeontx2-af: Exact match scan from kex profile)
Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
index 006beb5cf98d..27603078689a 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
@@ -593,9 +593,8 @@ static int npc_scan_kex(struct rvu *rvu, int blkaddr, u8 intf)
 	 * exact match code.
 	 */
 	masked_cfg = cfg & NPC_EXACT_NIBBLE;
-	bitnr = NPC_EXACT_NIBBLE_START;
-	for_each_set_bit_from(bitnr, (unsigned long *)&masked_cfg,
-			      NPC_EXACT_NIBBLE_START) {
+	bitnr = NPC_EXACT_NIBBLE_START - 1;
+	for_each_set_bit_from(bitnr, (unsigned long *)&masked_cfg, NPC_EXACT_NIBBLE_END + 1) {
 		npc_scan_exact_result(mcam, bitnr, key_nibble, intf);
 		key_nibble++;
 	}
-- 
2.25.1