linux-kernel - [PATCH v3] net: stmmac: compare p->des0 and p->des1 with _

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Message-Id: <20230519115030.74493-1-minhuadotchen@gmail.com>
Date:   Fri, 19 May 2023 19:50:28 +0800
From:   Min-Hua Chen <minhuadotchen@...il.com>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc:     Min-Hua Chen <minhuadotchen@...il.com>,
        Simon Horman <simon.horman@...igine.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] net: stmmac: compare p->des0 and p->des1 with __le32 type values

Use cpu_to_le32 to convert the constants to __le32 type
before comparing them with p->des0 and p->des1 (they are __le32 type)
and to fix following sparse warnings:

drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c:110:23: sparse: warning: restricted __le32 degrades to integer
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c:110:50: sparse: warning: restricted __le32 degrades to integer

Reviewed-by: Simon Horman <simon.horman@...igine.com>
Signed-off-by: Min-Hua Chen <minhuadotchen@...il.com>
---

Change since v1:
use cpu_to_le32 to the constants

Change since v2:
remove unnecessary parentheses

---
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
index 13c347ee8be9..ffe4a41ffcde 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
@@ -107,7 +107,8 @@ static int dwxgmac2_rx_check_timestamp(void *desc)
 	ts_valid = !(rdes3 & XGMAC_RDES3_TSD) && (rdes3 & XGMAC_RDES3_TSA);
 
 	if (likely(desc_valid && ts_valid)) {
-		if ((p->des0 == 0xffffffff) && (p->des1 == 0xffffffff))
+		if (p->des0 == cpu_to_le32(0xffffffff) &&
+		    p->des1 == cpu_to_le32(0xffffffff))
 			return -EINVAL;
 		return 0;
 	}
-- 
2.34.1