linux-kernel - [PATCH] net: fec: disable correct clk in the err path of fec_enet_clk

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Date:   Fri, 29 May 2020 23:24:56 +0800
From:   Liu Xiang <liuxiang_1999@....com>
To:     fugang.duan@....com
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Liu Xiang <liuxiang_1999@....com>
Subject: [PATCH] net: fec: disable correct clk in the err path of fec_enet_clk_enable

When enable clk_ref failed, clk_ptp should be disabled rather than
clk_ref itself.

Signed-off-by: Liu Xiang <liuxiang_1999@....com>
---
 drivers/net/ethernet/freescale/fec_main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index dc6f876..ac8d868 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1986,8 +1986,12 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
 	return 0;
 
 failed_clk_ref:
-	if (fep->clk_ref)
-		clk_disable_unprepare(fep->clk_ref);
+	if (fep->clk_ptp) {
+		mutex_lock(&fep->ptp_clk_mutex);
+		clk_disable_unprepare(fep->clk_ptp);
+		fep->ptp_clk_on = false;
+		mutex_unlock(&fep->ptp_clk_mutex);
+	}
 failed_clk_ptp:
 	if (fep->clk_enet_out)
 		clk_disable_unprepare(fep->clk_enet_out);
-- 
1.9.1