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Subject[PATCH v3] scsi: ufs: mediatek: Guard runtime PM functions
From: Shida Zhang <>

In a configuration with CONFIG_SCSI_UFS_MEDIATEK set to 'm' and
CONFIG_PM set to 'n', errors occur at compile time:

../drivers/ufs/host/ufs-mediatek.c: In function ‘ufs_mtk_runtime_suspend’:
../drivers/ufs/host/ufs-mediatek.c:1621:8: error: implicit declaration of function ‘ufshcd_runtime_suspend’; did you mean ‘ufs_mtk_runtime_suspend’? [-Werror=implicit-function-declaration]
../drivers/ufs/host/ufs-mediatek.c: In function ‘ufs_mtk_runtime_resume’:
../drivers/ufs/host/ufs-mediatek.c:1636:9: error: implicit declaration of function ‘ufshcd_runtime_resume’; did you mean ‘ufs_mtk_runtime_resume’? [-Werror=implicit-function-declaration]

Fix these errors by guarding the runtime PM functions with CONFIG_PM.

Reported-by: k2ci <>
Signed-off-by: Shida Zhang <>
Reviewed-by: Manivannan Sadhasivam <>
Changes in v3
Reword the subject and the commit message.
Changes in v2:
Guard these functions with CONFIG_PM instead of selecting it.

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 21d9b047539f..73e217260390 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1613,6 +1613,7 @@ static int ufs_mtk_system_resume(struct device *dev)

+#ifdef CONFIG_PM
static int ufs_mtk_runtime_suspend(struct device *dev)
struct ufs_hba *hba = dev_get_drvdata(dev);
@@ -1635,6 +1636,7 @@ static int ufs_mtk_runtime_resume(struct device *dev)

return ufshcd_runtime_resume(dev);

static const struct dev_pm_ops ufs_mtk_pm_ops = {
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