[PATCH AUTOSEL 5.15 019/109] sfc: ef10: Fix assigning negative value to unsigned variable

Sasha Levin
2022-05-30T14:07:11Z

From: Haowen Bai <baihaowen@meizu.com>

[ Upstream commit b8ff3395fbdf3b79a99d0ef410fc34c51044121e ]

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>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/1649640757-30041-1-git-send-email-baihaowen@meizu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 f5a4d8f4fd11..c1cd1c97f09d 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);

--
2.35.1