[PATCH v4 4/8] mtd: spi-nor: Separate preparation and locking

[Miquel Raynal]

While this operation will remain a single function call in the end,
let's extract the logic of the [un]prepare calls within their own static
helper. We will soon add new flavors of the *_[un]prepare_and_[un]lock()
helpers, having the preparation logic outside will save us from duplicating
code over and over again.

There is no functional change.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 drivers/mtd/spi-nor/core.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 01932dbaa5b9..0ec85f5e7043 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1071,24 +1071,40 @@ static void spi_nor_set_4byte_opcodes(struct spi_nor *nor)
 	}
 }
 
-int spi_nor_prep_and_lock(struct spi_nor *nor)
+static int spi_nor_prep(struct spi_nor *nor)
 {
 	int ret = 0;
 
 	if (nor->controller_ops && nor->controller_ops->prepare)
 		ret = nor->controller_ops->prepare(nor);
 
+	return ret;
+}
+
+static void spi_nor_unprep(struct spi_nor *nor)
+{
+	if (nor->controller_ops && nor->controller_ops->unprepare)
+		nor->controller_ops->unprepare(nor);
+}
+
+int spi_nor_prep_and_lock(struct spi_nor *nor)
+{
+	int ret;
+
+	ret = spi_nor_prep(nor);
+	if (ret)
+		return ret;
+
 	mutex_lock(&nor->lock);
 
-	return ret;
+	return 0;
 }
 
 void spi_nor_unlock_and_unprep(struct spi_nor *nor)
 {
 	mutex_unlock(&nor->lock);
 
-	if (nor->controller_ops && nor->controller_ops->unprepare)
-		nor->controller_ops->unprepare(nor);
+	spi_nor_unprep(nor);
 }
 
 static u32 spi_nor_convert_addr(struct spi_nor *nor, loff_t addr)
-- 
2.34.1