linux-kernel - [PATCH][next] octeontx2-af: Fix uninitialized variable val

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Message-Id: <20210917115747.47695-1-colin.king@canonical.com>
Date:   Fri, 17 Sep 2021 12:57:47 +0100
From:   Colin King <colin.king@...onical.com>
To:     Sunil Goutham <sgoutham@...vell.com>,
        Linu Cherian <lcherian@...vell.com>,
        Geetha sowjanya <gakula@...vell.com>,
        Jerin Jacob <jerinj@...vell.com>,
        hariprasad <hkelam@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Srujana Challa <schalla@...vell.com>,
        Vidya Sagar Velumuri <vvelumuri@...vell.com>,
        netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] octeontx2-af: Fix uninitialized variable val

From: Colin Ian King <colin.king@...onical.com>

In the case where the condition !is_rvu_otx2(rvu) is false variable
val is not initialized and can contain a garbage value. Fix this by
initializing val to zero and bit-wise or'ing in BIT_ULL(51) to val
for the true condition case of !is_rvu_otx2(rvu).

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: 4b5a3ab17c6c ("octeontx2-af: Hardware configuration for inline IPsec")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index ea3e03fa55d4..29b15b544bdc 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -4596,9 +4596,10 @@ static void nix_inline_ipsec_cfg(struct rvu *rvu, struct nix_inline_ipsec_cfg *r
 
 	cpt_idx = (blkaddr == BLKADDR_NIX0) ? 0 : 1;
 	if (req->enable) {
+		val = 0;
 		/* Enable context prefetching */
 		if (!is_rvu_otx2(rvu))
-			val = BIT_ULL(51);
+			val |= BIT_ULL(51);
 
 		/* Set OPCODE and EGRP */
 		val |= FIELD_PREP(IPSEC_GEN_CFG_EGRP, req->gen_cfg.egrp);
-- 
2.32.0