From: Haowen Bai <baihaowen@meizu.com>
To: Edward Cree <ecree.xilinx@gmail.com>,
Martin Habets <habetsm.xilinx@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
"Jakub Kicinski" <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>
Cc: Haowen Bai <baihaowen@meizu.com>, <netdev@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH V2] sfc: ef10: Fix assigning negative value to unsigned variable
Date: Mon, 11 Apr 2022 09:32:37 +0800 [thread overview]
Message-ID: <1649640757-30041-1-git-send-email-baihaowen@meizu.com> (raw)
fix warning reported by smatch:
251 drivers/net/ethernet/sfc/ef10.c:2259 efx_ef10_tx_tso_desc()
warn: assigning (-208) to unsigned variable 'ip_tot_len'
Signed-off-by: Haowen Bai <baihaowen@meizu.com>
---
V1->V2: to assign "0x10000 - EFX_TSO2_MAX_HDRLEN" is the actual
semantics of the value.
drivers/net/ethernet/sfc/ef10.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 50d535981a35..c9ee5011803f 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -2256,7 +2256,7 @@ int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
* guaranteed to satisfy the second as we only attempt TSO if
* inner_network_header <= 208.
*/
- ip_tot_len = -EFX_TSO2_MAX_HDRLEN;
+ ip_tot_len = 0x10000 - EFX_TSO2_MAX_HDRLEN;
EFX_WARN_ON_ONCE_PARANOID(mss + EFX_TSO2_MAX_HDRLEN +
(tcp->doff << 2u) > ip_tot_len);
--
2.7.4
next reply other threads:[~2022-04-11 1:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-11 1:32 Haowen Bai [this message]
2022-04-11 16:27 ` [PATCH V2] sfc: ef10: Fix assigning negative value to unsigned variable Edward Cree
2022-04-12 4:00 ` patchwork-bot+netdevbpf
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