From: Jiawen Wu <jiawenwu@trustnetic.com>
Date: Thu, 21 Aug 2025 02:34:06 +0000 (+0800)
Subject: net: wangxun: limit tx_max_coalesced_frames_irq
X-Git-Tag: v6.17.8~503
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e8c475c76c21253cc6bbbb3f931b024701bca786;p=thirdparty%2Fkernel%2Fstable.git

net: wangxun: limit tx_max_coalesced_frames_irq

[ Upstream commit fd4aa243f154a80bbeb3dd311d2114eeb538f479 ]

Add limitation on tx_max_coalesced_frames_irq as 0 ~ 65535, because
'wx->tx_work_limit' is declared as a member of type u16.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250821023408.53472-3-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
index c12a4cb951f68..254a48ede2660 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
@@ -334,8 +334,11 @@ int wx_set_coalesce(struct net_device *netdev,
 			return -EOPNOTSUPP;
 	}
 
-	if (ec->tx_max_coalesced_frames_irq)
-		wx->tx_work_limit = ec->tx_max_coalesced_frames_irq;
+	if (ec->tx_max_coalesced_frames_irq > U16_MAX  ||
+	    !ec->tx_max_coalesced_frames_irq)
+		return -EINVAL;
+
+	wx->tx_work_limit = ec->tx_max_coalesced_frames_irq;
 
 	switch (wx->mac.type) {
 	case wx_mac_sp: