[PATCH v1 11/17] mtd: ubi: nvmem: Change nvmem reg_read/write return type

[Joy Chakraborty <joychakr@xxxxxxxxxx>]

Change nvmem read/write function definition return type to ssize_t.

Signed-off-by: Joy Chakraborty <joychakr@xxxxxxxxxx>
---
 drivers/mtd/ubi/nvmem.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/ubi/nvmem.c b/drivers/mtd/ubi/nvmem.c
index 8aeb9c428e51..eab14821343d 100644
--- a/drivers/mtd/ubi/nvmem.c
+++ b/drivers/mtd/ubi/nvmem.c
@@ -20,8 +20,8 @@ struct ubi_nvmem {
 	struct list_head list;
 };
 
-static int ubi_nvmem_reg_read(void *priv, unsigned int from,
-			      void *val, size_t bytes)
+static ssize_t ubi_nvmem_reg_read(void *priv, unsigned int from,
+				  void *val, size_t bytes)
 {
 	size_t to_read, bytes_left = bytes;
 	struct ubi_nvmem *unv = priv;
@@ -55,7 +55,7 @@ static int ubi_nvmem_reg_read(void *priv, unsigned int from,
 	if (err)
 		return err;
 
-	return bytes_left == 0 ? 0 : -EIO;
+	return bytes - bytes_left;
 }
 
 static int ubi_nvmem_add(struct ubi_volume_info *vi)
-- 
2.45.1.467.gbab1589fc0-goog