linux-kernel - [PATCH -next] scsi: ufs: ufs-mediatek: Fix build error

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Date:   Mon, 4 Jul 2022 10:56:32 +0800
From:   Ren Zhijie <renzhijie2@...wei.com>
To:     <stanley.chu@...iatek.com>, <jejb@...ux.ibm.com>,
        <martin.petersen@...cle.com>, <matthias.bgg@...il.com>,
        <bvanassche@....org>
CC:     <linux-scsi@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        "Ren Zhijie" <renzhijie2@...wei.com>
Subject: [PATCH -next] scsi: ufs: ufs-mediatek: Fix build error

If CONFIG_PM is not set,
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-, will be failed, like this:
drivers/ufs/host/ufs-mediatek.c: In function ‘ufs_mtk_runtime_suspend’:
drivers/ufs/host/ufs-mediatek.c:1435:8: error: implicit declaration of function ‘ufshcd_runtime_suspend’; did you mean ‘ufs_mtk_runtime_suspend’? [-Werror=implicit-function-declaration]
  ret = ufshcd_runtime_suspend(dev);
        ^~~~~~~~~~~~~~~~~~~~~~
        ufs_mtk_runtime_suspend
drivers/ufs/host/ufs-mediatek.c: In function ‘ufs_mtk_runtime_resume’:
drivers/ufs/host/ufs-mediatek.c:1450:9: error: implicit declaration of function ‘ufshcd_runtime_resume’; did you mean ‘ufs_mtk_runtime_resume’? [-Werror=implicit-function-declaration]
  return ufshcd_runtime_resume(dev);
         ^~~~~~~~~~~~~~~~~~~~~
         ufs_mtk_runtime_resume
At top level:
drivers/ufs/host/ufs-mediatek.c:1444:12: error: ‘ufs_mtk_runtime_resume’ defined but not used [-Werror=unused-function]
 static int ufs_mtk_runtime_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~
drivers/ufs/host/ufs-mediatek.c:1430:12: error: ‘ufs_mtk_runtime_suspend’ defined but not used [-Werror=unused-function]
 static int ufs_mtk_runtime_suspend(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

The declarations of func "ufshcd_runtime_suspend()" and "ufshcd_runtime_resume()" depended on CONFIG_PM, so the function wrappers "ufs_mtk_runtime_suspend()" and "ufs_mtk_runtime_resume()"  both should warpped by CONFIG_PM too.

Reported-by: Hulk Robot <hulkci@...wei.com>
Fixes: e7bf1d50063c ("scsi: ufs: ufs-mediatek: Fix build warnings")
Signed-off-by: Ren Zhijie <renzhijie2@...wei.com>
---
 drivers/ufs/host/ufs-mediatek.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index c958279bdd8f..e006c2528a3a 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1427,6 +1427,7 @@ static int ufs_mtk_system_resume(struct device *dev)
 }
 #endif
 
+#ifdef CONFIG_PM
 static int ufs_mtk_runtime_suspend(struct device *dev)
 {
 	struct ufs_hba *hba = dev_get_drvdata(dev);
@@ -1449,6 +1450,7 @@ static int ufs_mtk_runtime_resume(struct device *dev)
 
 	return ufshcd_runtime_resume(dev);
 }
+#endif
 
 static const struct dev_pm_ops ufs_mtk_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(ufs_mtk_system_suspend,
-- 
2.17.1