[PATCH 2/3] hwrng: mtk - Add a local variable for struct device pointer

[Sakari Ailus]

Add a local variable for a struct device pointer instead of obtaining the
hwrng priv field and casting it as a struct device pointer whenever it's
needed.

Signed-off-by: Sakari Ailus <sakari.ailus at linux.intel.com>
---
 drivers/char/hw_random/mtk-rng.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/char/hw_random/mtk-rng.c b/drivers/char/hw_random/mtk-rng.c
index 1e3048f2bb38..38e57900080a 100644
--- a/drivers/char/hw_random/mtk-rng.c
+++ b/drivers/char/hw_random/mtk-rng.c
@@ -83,9 +83,10 @@ static bool mtk_rng_wait_ready(struct hwrng *rng, bool wait)
 static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
 {
 	struct mtk_rng *priv = to_mtk_rng(rng);
+	struct device *dev = (struct device *)priv->rng.priv;
 	int retval = 0;
 
-	pm_runtime_get_sync((struct device *)priv->rng.priv);
+	pm_runtime_get_sync(dev);
 
 	while (max >= sizeof(u32)) {
 		if (!mtk_rng_wait_ready(rng, wait))
@@ -97,8 +98,8 @@ static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
 		max -= sizeof(u32);
 	}
 
-	pm_runtime_mark_last_busy((struct device *)priv->rng.priv);
-	pm_runtime_put_sync_autosuspend((struct device *)priv->rng.priv);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_sync_autosuspend(dev);
 
 	return retval || !wait ? retval : -EIO;
 }
-- 
2.39.5