Use to_platform_device() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangt...@163.com>
---
 drivers/i2c/busses/i2c-st.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-st.c b/drivers/i2c/busses/i2c-st.c
index 25020ec..6ee7715 100644
--- a/drivers/i2c/busses/i2c-st.c
+++ b/drivers/i2c/busses/i2c-st.c
@@ -708,8 +708,7 @@ static int st_i2c_xfer(struct i2c_adapter *i2c_adap,
 #ifdef CONFIG_PM_SLEEP
 static int st_i2c_suspend(struct device *dev)
 {
-       struct platform_device *pdev =
-               container_of(dev, struct platform_device, dev);
+       struct platform_device *pdev = to_platform_device(dev);
        struct st_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
 
        if (i2c_dev->busy)
-- 
2.5.0


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