linux-kernel - [PATCH] net: txgbe: fix clk_name exceed MAX_DEV

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Date: Wed, 13 Mar 2024 16:06:34 +0800
From: Duanqiang Wen <duanqiangwen@...-swift.com>
To: netdev@...r.kernel.org,
	mengyuanlou@...-swift.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	maciej.fijalkowski@...el.com,
	andrew@...n.ch,
	wangxiongfeng2@...wei.com,
	linux-kernel@...r.kernel.org
Cc: Duanqiang Wen <duanqiangwen@...-swift.com>
Subject: [PATCH] net: txgbe: fix clk_name exceed MAX_DEV_ID limits

txgbe register clk which name is i2c_designware.pci_dev_id(),
clk_name will be stored in clk_lookup_alloc. If PCIe bus number
is larger than 0x39, clk_name size will be larger than 20 bytes.
It exceeds clk_lookup_alloc MAX_DEV_ID limits. So the driver
shortened clk_name.

Fixes: b63f20485e43 ("net: txgbe: Register fixed rate clock")
Signed-off-by: Duanqiang Wen <duanqiangwen@...-swift.com>
---
 drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
index 93295916b1d2..5b5d5e4310d1 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
@@ -571,7 +571,7 @@ static int txgbe_clock_register(struct txgbe *txgbe)
 	char clk_name[32];
 	struct clk *clk;
 
-	snprintf(clk_name, sizeof(clk_name), "i2c_designware.%d",
+	snprintf(clk_name, sizeof(clk_name), "i2c_dw.%d",
 		 pci_dev_id(pdev));
 
 	clk = clk_register_fixed_rate(NULL, clk_name, NULL, 0, 156250000);
-- 
2.27.0