[PATCH v4 07/13] mtd: rawnand: Add a helper to check supported operations

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

Let's use a helper to clearly check if an operation is supported or not.

Return -ENOTSUPP when ->exec_op() is not implemented as we cannot know.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
 drivers/mtd/nand/raw/internals.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mtd/nand/raw/internals.h b/drivers/mtd/nand/raw/internals.h
index 9d0caadf940e..b722af7a0b7e 100644
--- a/drivers/mtd/nand/raw/internals.h
+++ b/drivers/mtd/nand/raw/internals.h
@@ -106,6 +106,15 @@ static inline bool nand_has_exec_op(struct nand_chip *chip)
 	return true;
 }
 
+static inline int nand_check_supported_op(struct nand_chip *chip,
+					  const struct nand_operation *op)
+{
+	if (!nand_has_exec_op(chip))
+		return 0;
+
+	return chip->controller->ops->exec_op(chip, op, true);
+}
+
 static inline int nand_exec_op(struct nand_chip *chip,
 			       const struct nand_operation *op)
 {
-- 
2.20.1


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