linux-kernel - [PATCH net] net: stmmac: platform: fix build warning when with !CONFIG_PM

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Message-Id: <20210909092322.19825-1-qiangqing.zhang@nxp.com>
Date:   Thu,  9 Sep 2021 17:23:22 +0800
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     peppe.cavallaro@...com, alexandre.torgue@...s.st.com,
        joabreu@...opsys.com, davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net] net: stmmac: platform: fix build warning when with !CONFIG_PM_SLEEP

Use __maybe_unused for noirq_suspend()/noirq_resume() hooks to avoid
build warning with !CONFIG_PM_SLEEP:

>> drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c:796:12: error: 'stmmac_pltfr_noirq_resume' defined but not used [-Werror=unused-function]
     796 | static int stmmac_pltfr_noirq_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c:775:12: error: 'stmmac_pltfr_noirq_suspend' defined but not used [-Werror=unused-function]
     775 | static int stmmac_pltfr_noirq_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

Fixes: 276aae377206 ("net: stmmac: fix system hang caused by eee_ctrl_timer during suspend/resume")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 4885f9ad1b1e..62cec9bfcd33 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -772,7 +772,7 @@ static int __maybe_unused stmmac_runtime_resume(struct device *dev)
 	return stmmac_bus_clks_config(priv, true);
 }
 
-static int stmmac_pltfr_noirq_suspend(struct device *dev)
+static int __maybe_unused stmmac_pltfr_noirq_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct stmmac_priv *priv = netdev_priv(ndev);
@@ -793,7 +793,7 @@ static int stmmac_pltfr_noirq_suspend(struct device *dev)
 	return 0;
 }
 
-static int stmmac_pltfr_noirq_resume(struct device *dev)
+static int __maybe_unused stmmac_pltfr_noirq_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct stmmac_priv *priv = netdev_priv(ndev);
-- 
2.17.1